USB Device Descriptor Request Failed? Complete Fix Guide (2026)

Table of Contents

• Why USB Device Descriptor Request Failed Occurs
• Method 1: Try a Different USB Port and Cable
• Method 2: Uninstall the Unknown USB Device from Device Manager
• Method 3: Uninstall and Reinstall All USB Controllers
• Method 4: Disable USB Selective Suspend (Power Management)
• Method 5: Update USB and Chipset Drivers
• Method 6: Run the Hardware and Devices Troubleshooter
• Method 7: Disable Fast Startup
• Method 8: Perform a Full Power Cycle (Cold Boot)
• Method 9: Clear USB Registry Entries
• Frequently Asked Questions

USB Device Descriptor Request Failed is one of the most common and frustrating USB errors in Windows. When this error occurs, Device Manager shows an “Unknown USB Device (Device Descriptor Request Failed)” entry with a yellow exclamation mark, and the device status reads “Windows has stopped this device because it has reported problems. (Code 43). A request for the USB device descriptor failed.”[reference:0][reference:1]

According to Microsoft’s documentation, this error means Windows tried to enumerate the USB device but could not read a valid device descriptor from it[reference:2]. The device descriptor contains basic information like vendor ID and product ID that Windows needs to identify the device and load the correct driver[reference:3]. When this process fails, the device cannot function. According to Microsoft’s troubleshooting guides, this is typically a problem with the specific USB controller, ports, or cabling on the problematic PC rather than with the device driver or Windows configuration[reference:4].

For more Windows troubleshooting guides, visit our Windows 11 Troubleshooting Hub. You can also check our guide on USB port issues, our guide on storage detection, and our guide on USB-C speed problems for additional help.

For additional assistance, refer to Microsoft’s official USB support page and check the server status at DownDetector.

Why USB Device Descriptor Request Failed Occurs

Several factors can cause the device descriptor request to fail. According to Microsoft’s USB driver stack behavior documentation, this happens when one of the following fails during enumeration:

• Port reset request times out – The USB port fails to reset the device properly.
• The Set Address request for the device fails – Windows cannot assign a unique address to the device.
• The request for the device’s Device Descriptor fails – The device does not respond to the descriptor request.
• The USB Device Descriptor is malformed and fails validation – The descriptor data is corrupted or incomplete.
• The request for the Configuration Descriptor fails – Windows cannot read the device’s configuration information.
• The USB Configuration Descriptor is malformed and fails validation[reference:10]

Here are the most common reasons why USB Device Descriptor Request Failed occurs:

• Physical Connection Issues: Faulty USB ports (especially front-panel ports), damaged cables, or loose connections[reference:11]. As one Microsoft Q&A expert noted, “the ‘unknown USB’ error indicates a problem with the USB port or cable, suggesting a physical fault”[reference:12].
• Corrupted or Outdated USB Drivers: Following a Windows update, mismatched drivers can clash[reference:13].
• USB Power Management Issues: Power hiccups can occur when USB devices draw more power than the port can handle, or when Windows’ power-saving features interfere[reference:14][reference:15].
• Fast Startup Conflict: Fast Startup skips part of the boot process, preventing the system from fully loading needed driver components[reference:16].
• Corrupted USB Controller State: The USB host controller can become stuck in a non-functional state[reference:17].
• Windows 11 24H2 Update Issues: Following the Windows 11 24H2 update, USB controller driver errors have become significantly more common[reference:18].

Method 1: Try a Different USB Port and Cable

According to Microsoft’s troubleshooting guides, the first step when encountering USB Device Descriptor Request Failed is to rule out physical connection issues[reference:19].

1. Try a different USB port – On desktop PCs, prefer rear motherboard ports over front-panel headers, as front ports are more prone to connection issues[reference:20]. If your device is USB 3.x (blue port), also test a USB 2.0 port (black) if available[reference:21].
2. Try a different cable – A faulty cable is a common cause of descriptor read failures[reference:22].
3. Avoid USB hubs – Connect the device directly to the computer’s USB port. Do not use a USB hub or extension cable[reference:23][reference:24].
4. If using a power-hungry device (like an external HDD) – Use a Y-cable, powered hub, or the drive’s own power adapter if supported[reference:25].
5. Flip the USB connector – If using USB-C, try flipping the connector 180 degrees, as some cables have directional issues.

Method 2: Uninstall the Unknown USB Device from Device Manager

Uninstalling the problematic device forces Windows to re-enumerate it and reinstall the driver. According to Razer’s official support documentation, this is the primary recommended fix[reference:26].

1. Open Device Manager – Press Windows + R, type devmgmt.msc, and press Enter[reference:27].
2. Expand “Universal Serial Bus controllers” – Locate the entry labeled “Unknown USB Device (Device Descriptor Request Failed)” with a yellow exclamation mark[reference:28].
3. Right-click the entry and select “Uninstall device”[reference:29].
4. Check “Delete the driver software for this device” if the option appears, then click Uninstall.
5. Restart your computer – Windows will automatically reinstall the USB driver stack[reference:30].
6. After restarting, go to Windows Update and click “Check for updates”. Also check Optional updates for any available driver updates[reference:31].

Method 3: Uninstall and Reinstall All USB Controllers

If the error persists, uninstalling all USB controllers and allowing Windows to reinstall them can resolve deeper USB stack issues. According to multiple Microsoft Q&A solutions, this is an effective fix for persistent USB problems[reference:32].

1. Open Device Manager and expand “Universal Serial Bus controllers”.
2. Right-click each entry under this category (USB Root Hub, Generic USB Hub, USB Host Controller, etc.) and select “Uninstall device”[reference:33].
3. If prompted, do not check “Delete the driver software” for these items—just uninstall them.
4. Restart your computer – Windows will automatically reinstall all USB controllers[reference:34].
5. After restarting, plug in your USB device and test if it is now recognized.

Method 4: Disable USB Selective Suspend (Power Management)

Windows’ USB Selective Suspend feature can cut power to USB devices to save energy, but it sometimes fails to wake them properly, causing USB Device Descriptor Request Failed[reference:35].

1. Open Control Panel – Press Windows + R, type control, and press Enter[reference:36].
2. Go to Hardware and Sound → Power Options[reference:37].
3. Next to your active power plan, click “Change plan settings”[reference:38].
4. Click “Change advanced power settings”.
5. Expand “USB settings” → “USB selective suspend setting”.
6. Set both “On battery” and “Plugged in” to “Disabled”.
7. Click Apply and OK.
8. Restart your computer and test the USB device.

Additionally, you can disable power management for individual USB hubs in Device Manager:

1. In Device Manager, expand “Universal Serial Bus controllers”.
2. Right-click each “USB Root Hub” entry and select Properties.
3. Go to the Power Management tab.
4. Uncheck “Allow the computer to turn off this device to save power”.
5. Click OK and repeat for each USB Root Hub entry[reference:39].

Method 5: Update USB and Chipset Drivers

Outdated or corrupted drivers are a primary cause of the USB Device Descriptor Request Failed error[reference:40]. According to multiple sources, updating drivers is one of the most effective fixes[reference:41].

1. Open Device Manager and expand “Universal Serial Bus controllers”.
2. Right-click each USB Root Hub and select “Update driver” → “Search automatically for drivers”[reference:42].
3. Go to Windows Update → Advanced Options → Optional Updates and install any available driver updates[reference:43].
4. Visit your motherboard manufacturer’s website (Dell, HP, ASUS, MSI, etc.) and download the latest chipset drivers and USB controller drivers for your specific model[reference:44].
5. Install the drivers and restart your computer.

Method 6: Run the Hardware and Devices Troubleshooter

Windows includes a built-in troubleshooter that can automatically detect and fix hardware issues[reference:45].

1. Press Windows + R, type msdt.exe -id DeviceDiagnostic, and press Enter[reference:46].
2. Click “Next” to start the troubleshooter.
3. Follow the on-screen instructions to diagnose and fix hardware problems[reference:47].
4. If the troubleshooter finds issues, apply the recommended fixes and restart your computer.

Method 7: Disable Fast Startup

Fast Startup can prevent the system from fully loading driver components, leading to USB Device Descriptor Request Failed[reference:48].

1. Open Control Panel → Power Options.
2. Click “Choose what the power buttons do”.
3. Click “Change settings that are currently unavailable”.
4. Under “Shutdown settings”, uncheck “Turn on fast startup (recommended)”.
5. Click Save changes and restart your computer.

Method 8: Perform a Full Power Cycle (Cold Boot)

Performing a full power cycle can clear residual power states that may be interfering with USB enumeration[reference:49].

1. Shut down your PC completely (do not restart).
2. Unplug the power cable from the computer.
3. Wait 30 seconds to allow residual power to drain from the system.
4. Plug the power cable back in and turn on the computer.
5. After Windows loads, plug in the USB device and test if it is recognized.

Method 9: Clear USB Registry Entries

If none of the above methods work, clearing corrupted USB registry entries can resolve the issue. According to Microsoft’s instructions, you can use REG DELETE to remove problematic USB device entries[reference:50].

1. Open Device Manager and locate the “Unknown USB Device (Device Descriptor Request Failed)” entry.
2. Right-click the entry and select Properties.
3. Go to the Details tab and select “Hardware Ids” from the dropdown. Note the VID (Vendor ID) and PID (Product ID) values.
4. Press Windows + R, type regedit, and press Enter.
5. Navigate to: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\USB
6. Find the subkey that matches the VID/PID of the problematic device and delete it.
7. Alternatively, use the USB Repair Tool, a PowerShell-based tool that automates this process[reference:51][reference:52].
8. Restart your computer and plug in the USB device.

Conclusion: Resolving This USB Descriptor Error

When USB Device Descriptor Request Failed occurs, start with the simplest fixes: uninstall the problematic device from Device Manager, try a different USB port and cable, and disable USB Selective Suspend. Most cases of this error resolve with these steps. If the problem persists, uninstall all USB controllers, update drivers, run the Hardware and Devices troubleshooter, or disable Fast Startup. For more stubborn cases, perform a full power cycle, or clear USB registry entries. By following this guide, you can resolve USB Device Descriptor Request Failed and restore full USB functionality.

Frequently Asked Questions