The “Unknown USB Device (Device Descriptor Request Failed)” error is a common issue in Windows 10 and Windows 11. It usually appears when you connect a USB device such as a flash drive, keyboard, mouse, external hard drive, printer, or smartphone to your computer, but Windows cannot recognize it properly.
When this problem occurs, the connected device may stop working completely. In many cases, users also notice a yellow warning icon inside Device Manager. The system fails to communicate with the USB hardware because the device descriptor request does not complete successfully.
In this guide, I will explain several ways in detail so you can identify the exact cause and restore your USB device functionality.
Why does this error happen?
Before fixing the problem, it helps to understand why it occurs. Windows relies on USB drivers and hardware communication to detect connected devices. During the connection process, Windows requests a descriptor from the USB device. If the request fails, the system cannot identify the hardware.
Several factors can interrupt this communication process. A damaged USB cable may prevent proper data transfer. Corrupted drivers may stop Windows from reading the device information correctly. Power management settings can temporarily disable USB ports to save battery life. In some cases, the USB device itself may be physically damaged.
Because multiple causes are possible, you should test each solution carefully until the issue disappears.
Fix “Unknown USB Device Descriptor Request Failed” Error
If you want a fast solution, follow these quick troubleshooting steps first:
- Restart your computer and reconnect the USB device.
- Try a different USB port on your PC.
- Disconnect all unnecessary USB devices.
- Update or reinstall USB drivers from Device Manager.
- Disable USB power saving settings.
- Run the Windows Hardware and Devices troubleshooter.
- Update Windows, chipset, and drivers.
- Test the USB device on another computer.
If the issue still appears after trying these methods, continue with the detailed fixes below.
1: Restart Your Computer and Reconnect the USB Device
The first and easiest solution is restarting your computer. Temporary glitches inside Windows can interfere with USB communication and cause the descriptor request failure error.
Disconnect the problematic USB device from your computer completely. After that, restart your PC normally. Once Windows loads fully, reconnect the USB device carefully.
Make sure you connect the device directly to the computer instead of using a USB hub. Some USB hubs do not supply enough power, especially for external drives and larger peripherals.
If you are using a laptop, shut it down completely instead of using sleep mode. Wait for at least one minute before turning it back on. This allows the USB controllers to reset properly.
After reconnecting the device, check whether Windows recognizes it correctly. If the error still appears, move to the next solution.
2: Try a Different USB Port
Sometimes the issue is not caused by the device itself. A faulty or unstable USB port can prevent Windows from reading the device descriptor.
Disconnect the USB device and plug it into another USB port on your computer. If you are currently using a USB 3.0 port, try a USB 2.0 port instead. USB 3.0 ports are usually blue inside, while USB 2.0 ports are black.
Dust or debris inside the port can also interfere with the connection. Inspect the USB port carefully and clean it gently if necessary.
If your computer has ports on both the front and back, test both locations. Front panel USB ports sometimes have weaker internal connections because they use extension cables connected to the motherboard.
After changing the port, wait a few seconds for Windows to detect the device again. If the problem disappears, the original USB port may be damaged.
3: Disconnect Other USB Devices
Too many connected USB devices can overload the USB controller or create driver conflicts.
Disconnect all unnecessary USB devices from your computer. Leave only the keyboard and mouse connected if required. After that, reconnect the problematic device.
This method is especially useful for laptops and older computers that have limited USB power output. External hard drives, gaming controllers, webcams, and printers can consume significant power from the USB controller.
Once the extra devices are removed, Windows may successfully recognize the unknown USB device without errors.
4: Reinstall USB Drivers in Device Manager
Corrupted or outdated USB drivers are one of the most common reasons behind the descriptor request failed error.
Press the Windows + X keys together and select Device Manager. Inside the Device Manager window, expand the Universal Serial Bus controllers section.
Look for entries labeled Unknown USB Device (Device Descriptor Request Failed) or devices showing a yellow warning icon.
Right-click the problematic device and choose Uninstall device. Confirm the removal process if Windows asks for permission.
After uninstalling the device, restart your computer. Windows will automatically reinstall the necessary USB drivers during startup.
If the device still does not work, return to Device Manager and update all USB-related drivers manually. Right-click each USB Root Hub and choose Update driver.
This process refreshes the USB controller configuration and often resolves communication problems.
5: Disable USB Power Saving Settings
Windows includes power-saving features that can disable USB ports to conserve energy. Unfortunately, this feature sometimes interrupts USB communication and triggers descriptor request errors.
Open Device Manager again and expand Universal Serial Bus controllers. Double-click the USB Root Hub. Open the Power Management tab. Remove the check mark from the option labeled Allow the computer to turn off this device to save power.
Repeat this process for every USB Root Hub entry listed in Device Manager.
Next, open the Control Panel and go to Power Options. Select your current power plan and click Change plan settings. After that, select Change advanced power settings.
Expand the USB settings section and disable the USB selective suspend setting.
Apply the changes and restart your computer.
Disabling these power management settings ensures that Windows keeps the USB ports active continuously.
6: Update Windows
Outdated system files can sometimes cause compatibility issues with USB devices.
Open Settings and navigate to Windows Update. Click Check for updates and install all available updates.
Microsoft frequently releases bug fixes and hardware compatibility improvements through Windows updates. Installing the latest updates may automatically resolve the descriptor request failed error.
After the update process finishes, restart your computer and reconnect the USB device.
7: Update Chipset and Motherboard Drivers
The motherboard chipset controls communication between your hardware components and Windows. If chipset drivers are outdated, USB devices may stop working properly.
Visit your computer manufacturer’s official website and download the latest chipset drivers for your model. If you built your own PC, download drivers directly from the motherboard manufacturer.
Install the updated drivers carefully and restart your computer afterward.
Updated chipset drivers improve hardware communication and can resolve persistent USB detection problems.
8: Run the Hardware and Devices Troubleshooter
Windows includes built-in troubleshooting tools that can automatically identify hardware issues.
Press the Windows + R keys to open the Run dialog box. Type the following command: msdt.exe -id DeviceDiagnostic
Press Enter to launch the Hardware and Devices Troubleshooter.
Click Next and allow Windows to scan your system for problems. The troubleshooter may automatically repair USB-related issues or provide recommendations.
Once the scan finishes, restart your computer and test the USB device again.
Step 9: Disable Fast Startup
The Fast Startup feature in Windows helps computers boot faster, but it can sometimes prevent USB devices from initializing correctly.
Open the Control Panel and select Power Options. Click Choose what the power buttons do on the left side.
Select Change settings that are currently unavailable. Under the shutdown settings section, uncheck Turn on fast startup.
Save the changes and restart your computer.
Disabling Fast Startup forces Windows to perform a complete hardware initialization during boot, which may fix USB detection errors.
10: Check the USB Device for Physical Damage
If none of the software solutions work, the USB device itself may be damaged.
Inspect the USB connector carefully for bent pins, cracks, or burn marks. Also, check the cable for cuts or loose connections.
Try connecting the USB device to another computer. If the same error appears on multiple systems, the device is likely faulty.
External hard drives and flash drives can also fail because of internal hardware damage. In such cases, professional repair or replacement may be necessary.
11: Reset BIOS Settings
Incorrect BIOS or UEFI settings can interfere with USB functionality.
Restart your computer and enter the BIOS setup menu by pressing the appropriate key during startup. Common keys include F2, Delete, or F10.
Inside the BIOS menu, locate the option to restore default settings. Save the changes and restart the computer.
Resetting the BIOS removes incorrect hardware configurations that may affect USB controllers.
Be careful not to modify advanced BIOS settings unless you fully understand them.
12: Use System Restore
If the problem started recently after a driver installation or Windows update, using System Restore may help.
Search for Create a restore point in the Windows search bar and open it. Click System Restore and choose a restore point created before the issue began.
Follow the on-screen instructions to restore your system.
System Restore does not remove personal files, but it can undo problematic driver or system changes that triggered the USB error.
FAQs
What does “Unknown USB Device Descriptor Request Failed” mean?
This error means Windows cannot retrieve identifying information from the connected USB device. As a result, the operating system cannot recognize or use the hardware properly.
Can a damaged USB cable cause this error?
Yes. A faulty or damaged USB cable can interrupt data communication and prevent Windows from reading the device descriptor successfully.
Why does the USB device work on another computer but not mine?
This usually indicates a problem with your computer’s USB drivers, power settings, chipset drivers, or USB ports rather than the device itself.
Does reinstalling USB drivers delete my files?
No. Reinstalling USB drivers only refreshes the communication settings between Windows and the hardware. Your personal files remain safe.
Is this error common in Windows 11?
Yes. The error can occur in both Windows 10 and Windows 11, especially after system updates, driver conflicts, or power management issues.
Can BIOS settings affect USB devices?
Yes. Incorrect BIOS or UEFI settings may disable USB controllers or interfere with device detection.
Should I replace the USB device if nothing works?
If the device fails on multiple computers even after troubleshooting, the hardware is likely damaged, and replacement may be necessary.