Yesterday I did a clean install of Windows 8.1 on my laptop. Everything was working fine and I had installed all the correct drivers. Then at about 10 pm last night when I try to play minecraft I get about ten fps. So I try to reinstall the drivers, but it says that my graphics hardware is not detected. I have the Nvidia GeForce gtx 335m. It's not showing up in display adapters in the device manager, but in other devices it says there is an unknown device.