What if Win8.1 does not recognize the USB connected device?

Recently, Win8.1 users have reflected that when the USB mouse and keyboard are plugged in, the system cannot recognize it properly and prompts Unknown Device. What is going on? In fact, this is mainly caused by device failure, USB interface or system Plug and Play service being shut down. So how do you solve this problem? The following small series introduces you to the solution that Win8.1 does not recognize the USB connection device.

Symptom:

The computer prompt is not recognized. Enter the device manager and find the error message: Unknown Device.

Analysis:

The problem usually is equipment failure, USB interface or system Plug and Play service is turned off caused.

Solution:

1. First click on “Control Panel>---“Administrative Tools>---“Service”;

2. Turn on the Plug and Play service (so that the computer can recognize and adapt to hardware changes with little or no input. Terminating or disabling this service can cause system instability);

3. If the default is open, disable and then re-open;

4, and then open device Manager, uninstall Unknown device equipment, unplug the wireless device, restart the computer, and then plug the wireless device, install the driver, That's it.

These are Win8.1 small series to introduce the solution does not recognize USB connected devices. If you encounter this situation, you can follow the steps above.