Hi, Minh Hoang2
Welcome to the Microsoft Community.
Thank you for your feedback. I understand that you are experiencing the “Unknown USB Device (Device Descriptor Request Failed)” issue on Windows, here are some troubleshooting options:
Method 1: Check the hardware connection
Try plugging the device into a different USB port, especially the direct-connect port on the motherboard, to troubleshoot the port.
Replace the USB cable: Sometimes the USB cable may be damaged, replace the cable with a new one to see if that solves the problem.
Method 2: Power Management
Open Device Manager, just press Win + X and select “Device Manager”.
Find “Universal Serial Bus Controller”, expand and find “USB Root Hub” or “Universal USB Hub”.
Right click and select “Properties”.
In the “Power Management” tab, uncheck “Allow computer to turn off this device to save power”.
Method 3: Uninstall and reinstall the USB controller
Open Device Manager and expand “Universal Serial Bus Controller”.
Right-click on “Unknown USB Device (Device Descriptor Request Failed)” with the question and select “Uninstall Device”.
Once done, click “Scan for hardware changes” at the top of the device manager.
Method 4: Install FTDI Driver
Go to the official FTDI website ( FTDI drivers download ).
Download the latest drivers for your operating system.
Extract the downloaded file.
Open Device Manager, locate the USB device with the problem, right click on it and select “Update Driver”.
Select “Browse my computer for driver software” and browse to the driver folder you just extracted.
Click “Next” to complete the installation.
Disclaimer: Microsoft provides no assurances and/or warranties, implied or otherwise, and is not responsible for the information you receive from the third-party linked sites or any support related to technology.
Method 5: Disable Driver Signature Enforcement
Disable driver signature checking:
Press Win + X and select “Command Prompt (Administrator)” or “Windows PowerShell (Administrator)”.
Type the following command and enter: shbcdedit /set testsigning on
Reboot the computer.
Try to install the driver:
Try to install the FTDI driver again.
Enable driver signature checking:
After the installation is complete, you can re-enable driver signature checking by using the following command (in administrator mode): shbcdedit /set testsigning off
Reboot the computer.
If the above steps have no effect, it is recommended to try connecting the USB device on another computer to confirm if there is any problem with the device itself. If this still does not resolve the issue, it is recommended to contact the device manufacturer's technical support for more detailed support.
I look forward to your feedback, which will help me pinpoint your problem.
Best Regards,
Aaron| Microsoft Community Support Specialist