home Chimneys The USB port is not working. USB ports on the computer do not work - ways to solve the problem USB ports on the front of the computer do not work

The USB port is not working. USB ports on the computer do not work - ways to solve the problem USB ports on the front of the computer do not work

Depending on the version of Windows you have installed, some of the illustrations and information in this document may differ.

Before use

Some USB devices, such as printers, scanners, copiers, require software and USB drivers to be installed. front connecting a USB device to a computer. Always follow the instructions in the installation documentation provided by the manufacturer of the USB device.

When troubleshooting a USB device, you may need to disconnect the USB device from your computer.

Attention!
Always follow the manufacturer's instructions for disconnecting USB devices from your computer. Some USB devices must be disabled and extracted before they are disconnected from the computer. Some USB devices support the Windows function Safe device removal.

Troubleshooting steps

If applicable, follow the steps below to troubleshoot misbehaving USB devices.

Power supply. If the USB device is running on battery power, check that the battery is installed properly and is functioning properly. If the USB device is powered by an external power source, make sure all power connections are secure and the power cord is connected to a power source.

Check USB connection. Sometimes, simply disconnecting and reconnecting the device to the computer is enough to solve the problem.

Disconnect all USB devices from the computer except the USB mouse and USB keyboard (if used). These include hubs, flash drives, printers, and cameras.

After disconnecting all USB devices, follow these steps:
- When using a desktop computer plug the malfunctioning device into one of the USB ports on the back of the computer (ports connected directly to the system board).
  
  When using a laptop plug the malfunctioning device into a USB port on the laptop. Do not use a USB port splitter (such as a docking station or USB hub).

What happens when the device is disconnected?

Device is working properly: The problem is most likely related to power or poor overall system performance.

Note.
Please adhere to the following guidelines to avoid USB device failure in the future. Do not connect too many devices to your computer. Wait 5 seconds after connecting the device. Use hubs with autonomous power to connect other devices. Do not connect USB devices when the system is busy (slower than usual).

The device is not working: Leave the device connected and proceed to the next step.

Installing software from the manufacturer of the USB device A: Some USB devices require the manufacturer's software to be installed.

If the USB device came with software that was not previously installed, install the software according to the manufacturer's instructions.

After installing the manufacturer's software, reconnect the USB device.

The device should now work properly. If the problem persists, continue to the next step.

Microsoft Easy Fix Solutions: Microsoft provides a web application for automatic diagnosis and repair. Go to How to Use Microsoft Easy Fix Solutions (in English) and select the troubleshooter that best matches your problem. Then follow the instructions on the screen. If the device still does not work, continue to the next step.

Windows Update A: Running Windows Update will check for operating system updates required for your computer. Go to Windows Update (in English) and follow the on-screen instructions to check for updates and agree to all recommended and optional driver updates. If the device still does not work, continue to the next step.

Microsoft System Restore: If the USB device was previously working and then became unstable, please use the Microsoft system recovery to go back to when the device was still running. For more information, see Using Microsoft System Restore (Windows 10, 8) . If the device still does not work, continue to the next step.

Device Manager A: You may be able to fix the problem using Device Manager.

On Windows, search for and open Device Manager.

Do the following, depending on how the device is listed in Device Manager:

unknown device: The driver is not installed or was installed incorrectly (for example, the USB device was removed while Windows detected it and set it up as new hardware). To resolve this issue, uninstall and reinstall the device driver as shown below.
1. Disconnect the device.
  
  Right click unknown device and select Delete .
  
  A window will open.
  
  (if shown).
  
  Click the button OK.
  
  Restart your computer.
  
  Reinstall the device according to the manufacturer's instructions.

Other device: The USB ports work, but device drivers need to be installed. To resolve this issue, follow these steps:

Disconnect the USB device and wait 20 seconds.

Install the drivers according to the manufacturer's instructions.

The device name is displayed: USB ports and basic plug-and-play functions are working properly. Perhaps the source of the problem is the device itself or its drivers. Perhaps one of the following will resolve the issue:

Restart your computer and reconnect the USB device.

Disconnect the USB device, remove and reinstall the software previously installed for it (if any).

Remove and reinstall the device as shown below.
1. Without disconnecting the device, right-click the line with the device name in the Device Manager window and select Uninstall.
  
  A window will open Confirm device deletion.
  
  Click the box next to Uninstall the driver software for this device(if shown).
  
  Click the button OK.
  
  After the line with the device name disappears from the list, disconnect the device and restart the computer.
  
  Try to install the device again according to the manufacturer's instructions.

If the device you are using is a communication device, double-click the line with the device name and select a different COM port number, such as COM4 instead of COM3.

Device not listed: If the device is not listed, go to the next step.

Removing USB Root Hubs: Removing USB Root Hubs causes the system to reinstall Root Hubs the next time you restart your computer. Use the steps below to remove USB Root Hubs:

Windows does not detect USB 2.0 device (device name missing in device manager)

If the USB device appears in the Device Manager window, the problem might be power requirements.

Disconnect the device and follow these steps until the device is detected:

USB drives not showing up in the Safely Remove Hardware window

When you connect a USB storage device such as a flash drive, the device may not appear in the Safely Remove Hardware window after clicking the icon Safe removal of hardware in the Windows desktop notification area.

USB storage: The USB device may not be displayed if it was previously stopped and not disconnected from the USB port.

On some computers, when you plug in a hard drive or USB 3.0 flash drive, you get the error "Device not recognized" (USB Device Not Recognized) or " Windows stopped this device because it reported problems.(Code 43)" in Device Manager.

In this article, you will find instructions for troubleshooting the following issues:

USB device not recognized/not detected
USB 3.0 flash drive not recognized/not detected
USB 3.0 not working on Windows 7/10

How to fix: USB 3.0 port not working on computer

Before we move on to troubleshoot this issue, you should try the following:

Use a different USB cable if you are connecting the hard drive to a USB 3.0 port on your computer.
Connect USB 3.0 to USB 2.0 port.
Remove the USB device, turn off the computer, and unplug the power cord (or battery if you're using a laptop). Wait at least 2 minutes, and then reconnect the power cord. Turn on the computer and reconnect the USB device.
If you are using Windows 7, Vista, or XP, download and run the Microsoft Troubleshooter utility.
Reset BIOS to factory settings.

Solution 1 – Disable Fast Startup Feature in Windows 8 and 10

Note: If the fast startup option has already been unchecked, check it and restart your computer. Once restarted, uncheck the box and restart your computer again.

Reload a computer.

Solution 2 – Disable USB suspend settings

Solution 3 – Reboot your USB 3.0 device

Open device Manager. For this:

Press the keys " Windows» + « R" to open the window " Run".
In the window " Run» enter: devmgmt.msc.
Click Enter.

2. In Device Manager, expand "ControllersUSB» .

3. Right click on " RootUSB-hub(USB 3.0 ) ' and select ' Delete".

4. Windows will automatically find and install the latest drivers for your USB 3.0 port.

Solution 4 – Install the latest USB 3.0 drivers

Download Intel Driver Update Utility or AMD drivers.
Run driver update utility and press " Further" on the first screen.
Accept the license terms and click " Install".
Wait while the driver update utility is installed.
After installation is complete, click " Run».
Click " Start Scan".
When the driver scan is complete, click " Download", to download the latest drivers for your computer.
Finally, click " Install".
After installation is complete reload a computer.

Solution 5 – Restore Windows to a previous working state

If the solutions above did not help with the problem when USB 3.0 does not work on the computer, you should try restoring the computer to a previous working state. This can be done if you have activated a Windows restore point earlier.

Please write in the comments below if you managed to solve the problem with a faulty USB 3.0 port, and what solution worked in your situation.

USB ports stopped working on a Windows computer and laptop? The first step is to check each port on the computer, if everything does not work, you need to establish the cause.

The easiest and most reliable way is to connect a USB keyboard, turn off the computer, turn it on and try to enter the BIOS in a familiar way. If you get into the BIOS in a way that you couldn’t get through one port before, then the reason is technical.

In this case, you need to open the system unit and check the connection of the USB connectors to the motherboard. If everything is in order, you need to install a discrete USB card in the PCI slot and check if the ports from it work (maybe your motherboard is burned).

If you can get into the BIOS, and USB ports do not work in the operating system, you should check for installed drivers, reinstall them, update to the latest version.

Sometimes USB ports do not work if newer equipment is connected to them (before USB 1.0 or USB 2.0, you connect a USB flash drive or external HDD with USB 3.0), so you should check the equipment for compatibility.

Remember that USB ports, in addition to transmitting information, also have power ports, so it often happens that due to a weak power supply, they may also not work correctly.

If the computer or any application does not work correctly after connecting the device to the USB port, then there may be several reasons for this. Before you can pinpoint the source of the problem, you need to check the operation of the peripheral device, USB port, or USB driver. Below we list a few simple steps that will help you identify the problem and fix it yourself without going to a computer wizard.

In order to reload the USB driver and software that are in conflict, all you have to do is restart your computer. Very often this helps to fix the problem.

Sometimes a different order can help. Turn off the computer and disconnect any devices connected to the USB ports, including the keyboard and mouse. Turn on the computer again and when the operating system boots up, connect all the peripheral devices that were previously disconnected to the USB ports one by one. If a problem occurs when connecting a specific device, such as USB RAM, note for yourself on which port it happened. Try connecting this device to another free port. If the problem is gone, then the specific USB port is bad. Otherwise, the problem must be sought either in the peripheral device or in the USB cable.

USB cable and connector

In the event that the USB port does not work, very often the cause of the malfunction may be damage to the cable or connector. Carefully inspect these connection elements for damage such as cracks, chips or cuts. Look inside the USB port and connector and check for dirt, dust, or other small items. You can clean the connectors yourself with a dry brush or an air compressor (vacuum cleaner). This must be done with the cable disconnected. If the interface cable is severely bent or broken, then you should immediately replace it - a new cable costs a penny.

Delimitation of the problem - port or device

If the program or computer stops working immediately after connecting a new device to the USB port, then you should try connecting another device to it. If the computer continues to operate normally, then the problem is with the peripheral. Do you have a second computer? Try to connect a suspicious device to it and double-check its performance. If the situation repeats itself, it definitely needs to be changed. If you used a USB hub, exclude it from the connection chain. In case of USB problems, the device should be connected directly. In addition, problems can arise if you connect a lot of peripherals at the same time or connect several devices of the same model at the same time, for example, two smartphones or printers.

Driver reinstallation

Windows usually issues a message if there is a problem with the USB driver. If this happens, open the "Control Panel" through the start menu of the operating system. Find the “Device Manager” item in it, open the utility and find the subsection “USB Controllers” or “USB Controllers” in the list of installed equipment. Expand this item and find in the list of USB devices the item that is marked with an exclamation mark on a yellow background. If you find such a device, right-click on it and select the "Delete" context menu item. Reboot your computer. After that, the operating system will automatically reinstall the removed driver immediately after it boots. If reinstalling the driver did not resolve the issue, you should try updating it.

Driver update

If the USB port is not working, you can try manually updating the USB device driver. To do this, open the "System and Security" section in the "Control Panel", in which find the "Device Manager" subsection. Enter administrator credentials if prompted by the system. Next, find the problematic USB device in the USB Controllers list and double-click on it to open the configuration dialog. Open the "Driver" tab, and in it click the "Update" button. To start the driver update, enter your system administrator credentials again. After the update, restart your computer and check the performance of the problem device.

What is the difference between the USB ports on the back of the computer and those on the front? The difference is that those USB ports that are on the back connect directly to the USB controller, which is located on the motherboard itself and is an integral part of it. But the front USB ports go through a USB hub and are connected via a cable, and here it may be that the cable is of poor quality, and problems with the ports may appear.

If you connect two power-demanding USB devices (for example, a portable hard drive and a phone) to two USB ports on the front panel at once, then there will be a lack of power in one of these devices, and it will either not work correctly or will not work at all. Why ask you? The USB controller provides the device connected to it with power -500 mA at 5 V. If the USB interface device does not have an additional power adapter, then it must work from the USB interface, without additional power, that is, 5 V should be enough, but if the controller Two devices are connected via a USB hub.

The USB ports on the front of the computer are USB hubs that have one 9-pin input connector for connecting to the motherboard on one side and several USB ports for connecting devices on the other. The USB hub cable transmits information to the connected device, and also supplies it with electricity, but if there are two devices, and the hub is still powered by 500 mA at 5 V, then of course the devices do not have enough power.

You can connect a mouse, keyboard and flash drive to the USB hub, and if you want to use other devices such as a smartphone, external hard drive, etc. , you must use a USB hub with an additional power supply supplying 5V to each of its USB ports.
USB ports not working

If you suspect that the USB port on your computer is not working, check the device you are connecting to another computer. After all, it also happens that it is not the USB port that does not work, but the device that you are trying to connect, but it happens the other way around. Check the device on another computer. In the Award BIOS, find the Integrated Peripherals parameter, and in the Ami BIOS the Advanced parameter, go into them and see the USB Configuration item, press Enter, our USB Controller or USB Controller 2.0, should be in the Enabled position, that is, it is on .

USB ports not working

It also happens that the USB port is working, and the device is working properly, but there is no connection between the computer and the device ...... here the malfunction may be in the USB cable. And there are cases when the USB ports on the front panel are not connected at all.
Could the USB hub be faulty? Try another USB hub with a good shielded cable. Connect it to another 9-pin connector on the motherboard.

Sometimes the USB ports on the front panel are connected using pin cables (they also say in bulk), it may well be that the cable is faulty or the pinouts are mixed up.

Also, the reason for the failure of USB ports may be a low-power, and possibly not working, power supply.
Or maybe the southbridge is faulty. Do not forget about updating drivers for both connected devices and the motherboard chipset.

You can reboot the USB hub and the connected device will stop responding to you, this is cured by a normal reboot of the computer. Almost all USB hubs have power management and Windows can turn off the device to save power.

Firstly, if when you connect a flash drive to a computer or some other equipment, the port does not work quite correctly or the device connected to the computer is not detected by the system at all, then in this case you should make sure that the controller is turned on. PC motherboard.

Quite often, users forget to turn on the USB controller. It seems to be a simple, but still common problem when the user started the PC, but the device was not detected. It is possible to fix everything here, for this you need to go into the BIOS and enable the corresponding parameter. By the way, if you do not know what BIOS is, then I recommend that you definitely read the article

So, go to the BIOS, find the item "Integrated Peripherals - this applies to the Award BIOS", or in the Ami BIOS - Advanced ".

Next, press "Enter" and go to "Onboard Devices Configuration" and make sure that the items "USB Function" and "USB 2.0 Controller" are in the "Enabled" position. If so, then everything is included. Otherwise, the parameter can be turned off (OFF), position "Disabled". If the option is disabled, then enable it. Next, save the changes, then reboot the PC system and check the USB port is working. Be sure to check if the USB ports on the front panel of the system unit are connected to the motherboard itself using the so-called block.

If the port still does not work, then move on.

Secondly, maybe the problem is in the inoperability of the port and is completely hidden in the USB extension cable? For example, there are situations when the computer does not recognize a peripheral device (printer), for the simple reason that the USB cable itself is simply damaged. The reason for cable damage can be very diverse, for example, you accidentally put a chair on a cable or some heavy object and simply pinched it. Therefore, do not be too lazy to check the cable itself.

Thirdly, it is quite rare to encounter such a problem when the USB port does not have enough power. I will give you a specific example. Imagine that you have connected a USB flash drive and a printer to the front of the case of the system unit in the USB connector. As a result, the operating system, when sending data for printing, informs us that the document could not be printed. In general, your computer simply does not see the printer. And if you restart your computer, the printer is detected by the system, and you can easily print a document. However, after a while, the computer loses its connection to the printer again and the printer does not print. Do you know why?

Such a seemingly banal problem at first glance is due to the fact that there was a lack of power for the USB port. As a result, the USB port refuses to function properly. Basically, such an incident associated with a lack of power occurs when connecting several devices to the front panel USB ports.

Of course, not always, but such situations do occur. These USB ports are connected to the motherboard with a cable. This cable, in addition to data transfer, also provides power to the USB hubs themselves. It is possible that the power supplied to two devices connected to the USB hub at the same time may not be enough. In this case, I can recommend that you connect the printer to the built-in USB port, which is located on the PC motherboard.

You can also change the CMOS battery on the board. It happens that the problem disappears completely after replacing the battery on the motherboard. What is this battery and where is it, you can find out in this article:

In general, if your USB port, which is located on the front panel of the system unit case, does not work for you, then try to replace the USB hub itself. Who knows, maybe it is he who is faulty.

You can also try plugging the cable into a different USB port on the motherboard.

Fourthly, if the USB port controller, which is responsible for detecting and starting the device itself, still fails, then things are, of course, bad. There is, of course, the opportunity to take and solder the controller itself on the motherboard, but this takes time, you need to have the controller itself, and, of course, the soldering station itself. From the point of view of time costs, it is not quite reasonable. Another option is to entrust it to specialists, although there are also some pitfalls here, the price, the quality of work, as well as the competence of a specialist who specifically works on this problem.

Fifth, peripheral and mobile devices may not be recognized on your computer due to the lack of drivers and special software. It cannot be ruled out that if you have been using your operating system for quite a long time and the system has not been updated at all, and indeed the Windows build is not the original version, then in this case it is the case that the drivers are already considered outdated and therefore the system freezes happen all the time.

Sometimes Windows disables the USB hub altogether to save power. To prevent the USB device from being disconnected, you need to do the following.

Open the "Device Manager" by right-clicking on the "Computer" icon and selecting "Properties".

After the Device Manager window has opened, double-click the left mouse button on "USB Controllers", expand the branch.

Now you just have to go to the root USB hub and uncheck the box in the "Power Management" section, as shown in the figure below.

Sixth, sometimes reinstalling the operating system helps fix the problem when the USB port does not work. Although, of course, first try to roll back the system to a previous state. Here is an article that will show you how to do it:

Seventh, it is possible that your system has some kind of faulty hardware, which is just the same as an obstacle to the normal operation of the USB port.

This problem is very relevant in our time. After all, quite often users directly encounter this. So, there is a solution. USB ports can hang on the computer, contacts can close, and many more additional problems can occur when working at the computer.

We find a way out of our situation, check all devices for connection and disconnection. You will need to disconnect all devices and connect one at a time, for example, connect the keyboard first and see if it works, then connect the next device, let it be a mouse and so on. Connect additional USB devices, if they don’t work, then the problem is solved or you need to look in peripheral devices, maybe something is shorting there, but you never know.

Eighth, they generally forgot to enable the serial bus controller in the device manager. There are moments when you do not pay attention to the work of USB devices, turn on the computer, download music, listen and enjoy new works of art. True, everything comes unexpectedly, suddenly a USB device was needed, and then silence, it does not work. The thought immediately comes to mind, maybe the controller is not turned on, let's take it and check it, it is.

Each PC has a device manager that shows which devices are connected, whether all drivers are installed and updates are made.

In general, I think that you probably already know that in the absence of any driver, the system automatically marks it with a yellow exclamation mark, this means a malfunction, as a result, with two mouse clicks, an additional window opens, information about the code is displayed here malfunctions and the possibility of its recovery.

Ninth, if all of the above methods did not give a positive result, then I recommend that you install a USB PC controller on the motherboard.

If your computer has a low-power power supply, for example, 300 W, then it is likely that the cause of all the troubles is hidden in it, install a more powerful power supply, say 500 W, and check if the USB ports are working.

Concluding today's article, I would like to say that it is not always possible to easily find the culprit of all problems, sometimes it is not enough just to reinstall Windows to find out what really happened.

If there are no drivers for the serial bus controllers and the controllers themselves are marked with an exclamation mark, then you should either install the drivers for the controller, or you can remove all the controllers and restart the computer. After the computer boots, the system will try to install them again, and it is possible that all USB ports will work properly again.

Restarting the computer
If for some reason all USB ports have ceased to function, and USB devices are not detected, then for a start it will be enough just to reboot the system unit. Perhaps this procedure will be eliminated immediately. This can happen if there were no problems loading the drivers.

Update hardware configuration in device manager
A situation may arise when restarting the computer is not possible, because it performs some important operations. That is why, without rebooting the entire computer, you can only reboot the driver. This can be done through the "Device Manager". To take this action, just right-click on the label "My Computer" select "Manage".

In the window that appears as a result of this, you need to click on the "Action" tab, after which you need to click "Update hardware configuration". If, as a result of this procedure, the “USB Controllers” section appeared, then the problem is completely resolved, and USB will continue to function.

Disabling the USB controller
There is one great way to make USB ports work. To do this, disable and reinstall the USB controllers. You should immediately launch the same "Device Manager". A list of equipment will be displayed in a new window, and from it you need to find the USB controllers section. Next, you need to select and delete each of these devices. After all devices are removed, be sure to restart your computer. This will reset the controllers so the USB ports are available again.

USB Controllers: Driver Update
The USB controller drivers may be corrupted and therefore the USB ports will not work. In such a situation, the only correct way out is to find and reinstall the correct drivers. To do this procedure correctly, you should find out the manufacturer of the USB port, because you need to download the appropriate driver. If you manage to complete this task, then installing the driver will solve the problem in an instant.

Disconnecting other USB devices
Of course, situations may arise when many USB devices are connected, and the laptop will simply be overloaded. Not always the power supply may be enough for all connected devices.

Entering BIOS settings

To start changing the configuration, you need to get into the corresponding menu. It can be opened when the personal computer is turned on - before Windows starts loading from the hard drive.

Turn on the PC. In case it's already running: reboot. Wait for the speaker to beep: a short single beep indicates that all the internal components necessary for the operation of the computer have been detected.

Now you need to press a hotkey to call the configuration. This must be done before changing the screen. If you didn’t have time, and Windows started loading, reboot. The keys depend on the installed motherboard model and BIOS firmware version. You can find it in the user manual that came with the motherboard, on the official website of the manufacturer, or look at the screen of your PC when it boots up:

PC screen on boot

If you don't know the board model, it's okay. Just try pressing the following keys: Tab, Delete, Esc, F1, F2, F8, F10, F11, F12. One of them will definitely fit.

It is not necessary to try only 1 option at a time. You can quickly click all the buttons from the list without any problems. One of them will come up and start the BIOS settings, and the rest will be ignored.

Entering the BIOS/UEFI settings of the latest PCs

Many modern computers boot up so quickly that it is impossible to get into the keystroke method when turning on. This is also true for laptops. Therefore, the latest versions of Windows have acquired a new launch feature. Let's use Windows 8.1 as an example.
Swipe the mouse from top to bottom or bottom to top along the right edge of the screen and in the window that appears, click "Options".
Click on "Change PC settings"
Click "Update and Recovery". Reboot in Special Mode
Next: Recovery.
In the Special Boot Options section, click the Restart Now button.

Your PC or laptop will restart in setup mode. Once your PC restarts, you will also be able to choose to run from a USB stick or DVD.

Menu navigation

Almost all BIOS versions lack a graphical interface. This means that you will only have to work using the keyboard, as, for example, in the Windows console. Navigation is carried out using the up-down and right-left arrows. To open any section, use the Enter key to go back - "Escape". A small memo on the keys used is always shown on the screen.

The UEFI firmware suite is installed on the most expensive and powerful motherboards. It supports more drivers and can work with a mouse. Its interface will be familiar to users of Windows and other modern operating systems.

Each version has its own interface and set of options. Even the names of the same parameters may differ. The following article describes several popular BIOS releases.

A very common option that can be found on many modern computers. The main menu is divided into 2 parts: a list of categories and various actions like exit or save. You will work on the left side.

You need to go to the section called "Integrated Peripherals". There is no Russian version of the interface, so all commands are in English only. Use the down arrow to highlight this item and press Enter.

Here you need to enable (Enabled) 4 options:

USB EHCI controller is the main controller. If the motherboard has version 3.0 ports, this item will be divided into 2 parts: "Controller" and "Controller 2.0";
USB Keyboard Support - support for keyboards;
USB Mouse Support - mouse support;
Legacy USB storage detect - work with external data storage: flash drives, disk drives, disks of smartphones and digital cameras.

In some older versions, there are only 2 items "USB controller" and "Legacy USB storage support".

When you're done with the settings, press the F10 key to save your changes and restart your computer.

Phoenix AwardBIOS
Another popular version that can often be found on modern laptops. It does not have a main page, like AMI, but is equipped with convenient thematic tabs at the top. You can move between sections using the "left" - "right" arrows, and between items - using the "up" and "down" arrows.

Go to the "Advanced" section using the "Right" arrow. In it, find the category "USB configuration". All items in this section must be moved to the “Enabled” position. In some versions, the category "USB configuration" may be in the "Peripherals" tab and not in "Advanced".

To exit the menu, press F10 and confirm exit.

AMI BIOS for Asus
AMI version used on Asus laptops. Outwardly, it is very similar to Phoenix - a similar bookmarks bar. The USB settings are in the "Advanced" section. Go there, enable all options and exit with the F10 button.

UEFI
Contrary to popular belief, UEFI is not part of the BIOS. It can rather be called a more advanced, but less popular competitor. There are a large number of different versions, each with its own interfaces. However, here the control is similar to the familiar Windows, so you can easily find the options you need.

Windows Settings
If at the BIOS level all ports and controllers are enabled, but the USB ports still do not work, the problem may be in the settings of your Windows system.

First, try simply disconnecting and reconnecting the device. This will cause the drivers to be validated. If something is wrong with them, Windows will try to reinstall them.

If nothing happens when you reconnect, try enabling the controller in the Windows registry. To do this, do the following:

Call the "Run" dialog using Win + R (or via "Start": in XP and 7-ke by clicking on it with the left mouse button, and in 8 and 10 versions - with the right mouse button). Enter regedit
Enter
regedit
and click OK.
Navigate to "HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Services USBSTOR".Registry Editor
Double click on the "Start" entry to open the editing window.
Change the value to "3". With any other parameter values, USB ports will not work.

USB port not working, both on the front panel and on the back of the system unit, too, or they do not work correctly, I connect the phone to the USB port on the front panel, it is successfully detected in the system, but if at this moment I also connect a portable hard drive (there are two USB- port) then it is not detected in the system, and the phone freezes. I wrote to you about this, you advised to reboot and use only one device or use the USB ports located on the motherboard at the back of the computer. I wonder why? My scanner, connected to the USB port on the back of the system unit, also sometimes does not want to work. The computer has Windows 7 Home Basic preinstalled, it came with it upon purchase, everything should be in order with the drivers, the USB 2.0 specification.

With all respect, Andrew.

USB port not working

I will give numerous examples of troubleshooting this malfunction that I personally know, if you are not interested in reading the entire article, go to the end of the article, directly to the description of the malfunctions, but you will miss a lot, for example, an interesting story about how I almost ruined my father-in-law's expensive Smartphone, This experience will definitely help you.

You see, it is one thing to connect your device to a USB controller, which is an integral part of your motherboard chipset, and another to a Chinese USB hub that outputs several USB ports from the motherboard via a cable to the front panel. It is possible that your hub cable may be defective. In general, let's look at all the possible causes of your problems.

If you connect two power-hungry USB devices at the same time to the two USB ports on the front panel (for example, a portable hard drive and a phone), then one of these devices immediately experiences a lack of power and it refuses to work or does not work correctly. Why? The USB controller provides the device connected to it with power -500 mA at 5 V. If the USB interface device does not have an additional power adapter, then it must work from the USB interface, without additional power, that is, 5 V should be enough, but if the USB controller Two devices are connected using a hub. Many may notice that everything works for them, but another question is whether it works correctly?

Promised short story. My father-in-law was given as a gift abroad. A smart phone – a hybrid of a phone and a pocket computer, beautiful, good, but there is no Russian language, naturally the question arose of how to Russify? I won’t go into details, I’ll say in simple words, we go to the official website of the phone and find out the version of the latest firmware, it may very well contain the Russian language, install a special program and quite legally flash it, but there is one thing, you can’t interrupt the firmware process that has begun, otherwise you can destroy the device.

So I connected the Smartphone to the USB port on the front panel computer, with which I never had problems and launched the program, the process was interrupted several times and generally hung for half an hour, then I had thoughts: USB port not working or a smartphone USB extension cable or the case in the firmware program. I had to unplug the device, which also wouldn't turn on, and plug it into the second USB port on the front panel. Sometimes the USB hub can be rebooted, this is cured by rebooting, I rebooted and tried to start the firmware process again. Several people were watching me and groaning. And I had to start it all on the birthday of the owner of the phone, my father-in-law.

The process again ended in nothing. I went for broke and connected the phone to the USB port, as many say, on the back, that is, located directly on the motherboard of my computer and which is an integral part of the mother's chipset, rebooted and started the process again, going through different options, among which was this one - buying a new Smartphone for my father-in-law. Now, now it will be Russian, I spoke then, trying to keep up the good work in the presence of numerous relatives, but there was still no Russian, the process went slowly, but already surely and without stopping. Finally, welcome! Wow everything worked out.

There was a case when the problem was solved by replacing a low-power 300W and most likely faulty Power Supply, the output power of which was already quite small.
Once I was not able to determine the cause of the poor performance of the USB port located on the motherboard, but a month later, the south bridge burned out on this computer, here is the answer.
A phone, camera, scanner, printer may not work properly or not be detected at all in the operating system from any USB port on a computer without full-featured software, which includes drivers. You can download all this economy on the official website of the device manufacturer.
Sometimes it costs and the USB port will work.
USB ports on your computer may not work due to the deplorable state of your operating system, if you have been using it for many years, besides, you have disabled updates, it is advisable to reinstall it or restore system files. The build of Windows that you installed plays a big role, it is advisable to use the original assemblies and install native drivers for them taken from the website of your hardware manufacturer. In non-original builds, a lot has been changed and there are mostly outdated driver packages at best. The chipset of the motherboard must have native drivers and the latest versions.
Sometimes you can reboot the USB hub and the connected device will stop responding to you, this is cured by a normal reboot of the computer. Almost all USB hubs have power management and Windows can turn off the device to save power. How to ban? You can read with us.
If the USB port is still out of order and this was confirmed by professionals, seal it with tape and do not use it. If you don't have enough USB ports, you can buy a multi-USB card reader with an additional power adapter, or a worse option - an additional PCI-USB card.
Sometimes friends should disable the USB 2.0 Controller in the BIOS and the problematic device will be detected, but other USB devices, in turn, may have problems.

Peripheral devices such as a mouse, keyboard, webcam, printer are usually connected to the computer via USB ports. In this case, it often happens that one or more ports stop working. That is, when connected to a computer, for example, a flash drive, it is not recognized, the keyboard or mouse may freeze, and the printer may not respond and print pages.

There are several likely reasons why some or all of the USB ports on your computer are not working. Let's try to understand this issue and find out what should be done to restore the normal functioning of the computer.

Checking the BIOS settings

The first thing you should pay attention to is the BIOS settings of the computer. You will need a working keyboard to enter the BIOS. If the keyboard is connected to the computer via USB and it does not work, then you need to connect a keyboard with a PS / 2 connector. Otherwise, you simply cannot do anything.

So, we go into the BIOS, for which, when starting the computer, you must press the enter key, usually it is DEL. There may be another key that is displayed on the screen and is listed in the motherboard manual. After entering the BIOS, find the section responsible for the integrated devices (Integrated Peripherals) or the "Advanced" section. Here you should find the subsection “Onboard Devices Configuration”. It is in it that the parameters responsible for the operation of USB controllers are located: USB Function or USB 2.0 Controller. These parameters must be enabled (Enabled). And if one of them is disabled (Disabled), then hover over it and press Enter, thereby enabling it. To prevent your changes from being reset, you must save them by pressing F10 and confirm the save by pressing the Y or Enter key.

After rebooting the computer, check if the USB ports are working. And if not, then you should look for the cause elsewhere.

USB ports on the front of the computer do not work

As a special case, USB only on the front panel may not work for you. In such a situation, it is necessary to check whether the necessary connectors on the motherboard are connected and whether the wires are damaged. To do this, open the side cover of the system unit and pay attention to the connector at the bottom of the motherboard. The board itself has the inscription USB1 or USB2, as well as on the block itself. The wires from the block go to the front panel, and if they are disconnected or broken in one place, then you have found the cause of the malfunction. Damaged wires should be connected or replaced. It will not be superfluous to check the contact in the connector on the motherboard. It is also worth paying attention to the board located on the front panel. Perhaps there is a short circuit, by the way, such a circuit can be triggered by accumulated dust. Therefore, be sure to clean the system unit from dust.

Problems with the device itself or the cable

The next source of USB problems can be the cable connected to, for example, a printer. This error is easy to identify and fix. We connect a USB flash drive to the checked connector. If it works, then we try to connect other known good equipment using a suspicious cable, for example, a USB hub. If it also refuses to work, then the reason is definitely in the cable and it should be replaced.

Power outages

There are situations when there is simply not enough power for all devices. For example, when connecting an external hard drive that uses two USB connectors at once, the printer or keyboard may turn off. In this case, the power of the power supply is not enough to provide energy to all consumers. In this case, the problem may not appear immediately, but after some time after turning on the computer. There are several ways out of the situation. If you have a low-power power supply installed, for example, 300 W, then it would be logical to change it to a more powerful one, 450-600 W. You can also use an active USB hub (with external power). It will allow not only to increase the number of connected USB devices, but also to power them from a separate power supply.

Another reason affecting USB performance is a dead CMOS battery. But at the same time, every time you turn on the computer, you will observe the system time and date that have gone astray. After replacing the battery, the problem goes away. But this is not common, so you should check other possible sources of malfunction.

Missing or incorrect installation of USB drivers

Causes related to software malfunctions in Windows 7/10 can be identified using the Device Manager. If you notice that one or more devices specifically does not work, regardless of the port used, then this may indicate that the problem is in the device itself. Open the Control Panel and go to the Device Manager section. All connected devices will be displayed there. If there are items in the list that have a yellow exclamation mark next to them or an Unknown device instead of a name, then the problem is in this device itself. There may be several possible problems here.

Often USB inputs stop working after reinstalling Windows 7/10. This is caused by improper installation of drivers, or the necessary drivers may not be found at all. You will have to select and install manually.

Often, to fix a problem, you just need to update the driver. So, if automatic Windows updates are disabled, and the system itself was installed a long time ago, then the relevance of the software is lost, system errors may appear. At the same time, the device starts to work incorrectly, or even stops functioning altogether. To update (reinstall) the USB controller drivers, you can use the motherboard driver CD/DVD or download the necessary drivers from the motherboard manufacturer's website.

You can also turn off the power saving feature for all ports using the Device Manager. Expand the list of used USB devices hidden in the USB controllers, Mouse and other pointing devices, Keyboards sections. Double-click on the desired device to open the properties window. Now switch to the "Power Management" tab and uncheck "Allow the computer to turn off this device to save power." Thus, the device will be activated always and under any circumstances.

If some equipment is not recognized, then there may be a problem with the drivers already known to us, as well as a hardware problem, consisting in a lack of contact, cable damage, or a controller malfunction. Moreover, it often happens that when a faulty device is connected, the rest stop working normally. The keyboard starts to freeze, as does the mouse, and the printer stops printing. The problem is similar to a lack of power, that is, the consumption of all power goes to a faulty device, which may have an ordinary short circuit or other malfunction.

USB ports not working due to damaged controller

If none of the above actions helped restore the USB ports, then you should check the motherboard USB controller, which could have failed. In this case, high-quality repairs and diagnostics should be entrusted to the specialists of the service center. As a way out of the problem, try installing an expansion board, the so-called USB PC controller, which is installed in the PCI slot on the motherboard. This solution is much cheaper than repairing the USB controller of the motherboard, and when using an additional USB hub, the problem with the lack of ports will not be relevant at all.

As you can see, finding and fixing problems with USB ports is a rather troublesome business, and all because there can be a lot of reasons. Consistently finding and eliminating obviously wrong paths will allow you to identify and fix the problem.