Win8.1 does not recognize the solution for USB connected devices

Xiaobian here to share with you is about Win8.1 unrecognized USB connection device solution, according to some users using Win8.1 system, when plugged in USB mouse and keyboard, the system is not normal Identification.

Symptom:

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

Cause Analysis:

This problem is usually caused by a device failure, USB interface, or system Plug and Play service being shut down.

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, please disable, then re-open;

4, then open the device manager, uninstall the Unknown Device device, unplug the wireless device, restart the computer, then plug in the wireless device, install the driver, you can .