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Unknown USB device descriptor Request Failed (7 solutions)

Unknown USB device descriptor Request Failed

The “Unknown USB Device Descriptor Request Failed” error can be perplexing, preventing USB devices from connecting and functioning properly on Windows computers. This error occurs when Windows fails to recognize a connected USB device, which is frequently caused by driver conflicts, hardware malfunctions, or incorrect system settings.

This article looks at a variety of effective solutions, ranging from simple troubleshooting steps like reconnecting the device and updating drivers to more nuanced approaches like adjusting power settings and testing the device on different computers, all with the goal of restoring proper communication between your USB device and the Windows operating system.

How to fix the “Unknown USB Device Descriptor Request Failed” error in Windows

The error message “Unknown USB Device Descriptor Request Failed” in Windows indicates that the system is unable to recognize a USB device due to corrupted or outdated drivers, hardware issues, or incorrect configuration settings.

Here are the most effective ways to address and resolve this issue:

Solution 1: Reconnect the USB Device

Sometimes, a simple reconnection can fix temporary communication issues.

  1. Disconnect the USB device from your computer.
  2. Restart your computer.
  3. Reconnect the USB device to a different USB port, preferably on the back of a desktop PC, as these ports are directly connected to the motherboard and may provide a more stable connection.

Solution 2: Update USB Device Drivers

Outdated or corrupted device drivers can cause recognition issues.

  1. Right-click the Start button and select Device Manager.
  2. Find the problematic device under Universal Serial Bus controllers. It might be listed as “Unknown USB Device (Device Descriptor Request Failed)”.
  3. Right-click it and select Update driver > Search automatically for updated driver software. Follow the prompts to install any found updates.
  4. If Windows doesn’t find a new driver, visit the device manufacturer’s website to download and install the latest driver manually.

Solution 3: Uninstall and Reinstall USB Controllers

This method refreshes the USB controller drivers, potentially resolving the issue.

  1. Open Device Manager.
  2. Expand Universal Serial Bus controllers. Unknown USB device descriptor Request Failed
  3. Right-click each entry under this section and select Uninstall device. Do this for all USB controllers.
  4. Restart your computer. Windows will automatically reinstall the USB controllers.

Solution 4: Disable USB Selective Suspend Setting

The USB Selective Suspend feature can sometimes cause USB devices to malfunction.

  1. Go to Control Panel > Hardware and Sound > Power Options.
  2. Click on Change plan settings next to your selected power plan.
  3. Click on Change advanced power settings.
  4. Expand the USB settings and then USB selective suspend setting. Set it to Disabled.
  5. Click Apply and OK.

Solution 5: Check for Windows Updates

Installing the latest Windows updates can provide fixes for USB-related issues.

  1. Go to Settings > Update & Security > Windows Update.
  2. Click Check for updates and install any available updates. Unknown USB device descriptor Request Failed

Solution 6: Use a Powered USB Hub

If the issue is related to power supply, using a powered USB hub can ensure that your USB device receives adequate power. You can usually recognize powered USB hubs by the fact that they have their own power source.

Solution 7: Check the Device on Another Computer

To rule out hardware issues with the USB device itself, try connecting it to another computer. If the device works on another system, the issue may be with your computer’s USB ports or settings.

The “Unknown USB Device Descriptor Request Failed” error can seriously impair the performance and recognition of USB devices on your Windows system, but it is not insurmountable. You can identify and resolve the issue by following the steps outlined in this guide, which range from basic hardware checks and driver updates to more in-depth system adjustments.

Understanding that this error can come from a variety of sources is critical to determining the best approach to troubleshooting. Whether it’s by updating system software, modifying power management settings, or determining the health of the USB device itself, there’s a way to fix the error and improve the compatibility and functionality of your USB devices with Windows.

Picture of Aleksandar Ognjanovic

Aleksandar Ognjanovic

Managing editor at Mobile Internist. @lemmingspain My fascination with mobile technology, particularly Android and iOS, began years ago and continues today. I'm captivated by the constant evolution in the smartphone industry and its impact on our daily lives, always anticipating the next big innovation. That’s the main reason why I found myself writing instructive content on the subject for users who are not as familiar with all the bells and whistles.
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