Plug Off Your VGA Card and Clean the gold sides using eraser, and reinstall your windows if you using windows 10, i suggest you to re-install your windows to windows 7 64 bit because Nvdiai Gt710 is Old Version of VGA I think windows 10 cannot recognize your Nvidia GT 710 Driver. You Can download the driver in this link http://www.nvidia.com/download/driverResults.aspx/82701/en-us