Solve the Win8 system does not recognize the Usb device

  
                                    

A similar situation occurs because the interface is not in contact or the device is faulty. The solution is as follows:

Press win+x on the desktop and select Control Panel. Then select “Administrative Tools> and "Services", as shown:

Find Plug and Play in the service and set its service status to Start, if it is already open The status will be restarted, as shown:

Then return to the desktop, open the device manager, uninstall the unrecognized USB device, then restart the computer, reconnect the device, reinstall the device driver, so Can be solved, as shown:

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