An Unknown USB Device indicates that your USB driver stack failed to enumerate a USB device. The detection, identification and leading of drivers for the USB device fall under USB enumeration.
During this process, the hub driver sends a reset request to the port. If the port doesn’t respond within the timeout period, the hub retries sending the request three times more. If even the fourth attempt times out, enumeration cancels, and you get the Port Reset Failed error.
In this article, we talk in detail about the probable causes and solutions for this issue.
Causes of Unknown USB Device (Port Reset Failed) Error
Here are the potential reasons for the Unknown USB Device (Port Reset Failed) error:
Fixes for Unknown USB Device (Port Reset Failed) Error
The first thing you should do is restart your PC, as a proper reboot can fix many minor system problems. you may do so twice, first while connecting the USB device and second while disconnecting it.
Also, ensure to turn off Fast Startup, as it can prevent your system from fixing issues it would otherwise resolve.
If restarting your computer doesn’t fix this error, try out the possible solutions we have mentioned below:
Before moving on to the solutions below, it’s best to narrow down the exact device with the error. The issue may be with the external USB device, the cable, the ports used, or your computer. So, perform the following operations:
By checking all the devices, you may determine whether the issue is with the hardware or the software.
If it’s a case ofa defective USB device or cable, it likely needs to be replaced. However, check with a hardware specialist whether they can repair it before buying a new one. If you have another device as an alternative, you may use it in the meantime.
Also, if you connect two USB devices to theports on the same sideof your PC, they can interfere with each other, causing such issues. So, try using only one device on one side, or reconnect them one at a time after removing both.
Hardware and devices troubleshooter
The hardware and devices troubleshooter can fix many minor errors on your peripheral devices. you may run this tool whenever you encounter the Unknown USB Device (Port Reset Failed) error.
