Win8 does not recognize the newly added USB device

. Symptom:
When Win8 uses a wireless device (wireless mouse, wireless keyboard, other wireless devices, etc.), it cannot be recognized after plugging in the device. Unknown Device appears in the device manager. The recognized USB device, the driver can not be installed properly.

Cause analysis:
The problem is usually a device failure, USB interface or the system Plug and Play service is turned off.
Solution:
Please open the Control Panel ——Administrative Tools——Services——just need to enable the Plug and Play service (so that the computer can recognize with little or no user input) And adapt to hardware changes. Terminating or disabling this service will cause system instability.) If the default is enabled, please disable and then turn it back on.

Then Device Manager —— uninstalled the Unknown Device device, unplugged the wireless device, restarted the computer, plugged in the wireless device, installed the driver, and it was fine.