The "Unknown USB Device (Device Descriptor Request Failed)" error means Windows can't identify a connected USB device, often due to insufficient power, driver issues, faulty hardware, or a loose connection. To fix it, first try restarting your PC and plugging the device into a different port or a different computer to test. If that doesn't work, you can uninstall the device's driver in Device Manager, or update your USB controllers, disable fast startup, and check for Windows updates.
1. Basic Hardware Checks
Restart Your PC: A simple restart can resolve temporary glitches.
Try a Different USB Port: The current port might be faulty.
Try a Different USB Device: If another device works, the original device is likely the issue.
Try a Different Computer: This helps determine if the problem is with the device or your computer.
Check for Damage: Inspect the USB cable and device for any physical damage.
Use a Powered USB Hub: If the device isn't getting enough power, a powered hub can provide it.
2. Software and Driver Solutions
Uninstall and Reinstall the Device:
Open Device Manager (search for it in the Start menu).
Locate the Unknown USB Device under Universal Serial Bus controllers.
Right-click it and select Uninstall device.
Restart: your computer to allow Windows to reinstall the driver.
Update USB Drivers: In Device Manager, right-click on your USB controllers and select Update driver.
Disable Fast Startup: Fast Startup can interfere with USB connections.
Search for Power Options in the Start menu.
Click Choose what the power buttons do.
Click Change settings that are currently unavailable.
Uncheck Turn on fast startup (recommended) and save changes.
Check for Windows Updates: Ensure your operating system is up to date, as this can include driver updates.
3. Advanced Troubleshooting
Scan for Hardware Changes: In Device Manager, click on the Action menu and select Scan for hardware changes.
Disable USB Selective Suspend:
Go to Power Options > Change plan settings > Change advanced power settings.
Expand USB settings and then USB selective suspend setting.
Change the setting to Disabled for both "On battery" and "Plugged in".
