If this does not work, then you need to disable the USB driver signature feature of Windows.
Posted - 10/05/2015 : 17:00:41 I just upgraded to Windows 10 64 bit and my GQ-4X is not recognized. I tried installing the USB driver version 2.01 but windows 10 refuses saying "The third-party INF does not contain digital signature information." Is there an updated, Windows 10 compatible driver available?
Posted - 08/31/2015 : 00:14:01 it work ok. i have it.