I will get to the point: Windows 7 ultimate was working fine with graphics card, upgrade to windows 10 and machine runs very slowly, graphics card is not in device manager, and dxdiag says Microsoft basic display adaptor. I can't use the install disc, remove and re-install the driver, or download software because Microsoft has wiped it from existence. Gpu is Geforce 210. There is a compatible driver to download on NVidia website(341.74) but if the hardware is invisible then it won't work. Any suggestions? I am just a weekend away from reverting back to windows 7 ultimate so we can get back to gaming.