Designated driver needed... for William's computer

I'm trying to reload William's OS on a fresh hard drive. My big hang up now is that I can't find the driver for his video card and without it, Minecraft doesn't want to run correctly. I can't shift him over to it without Minecraft! Time is also an issue as he likes to use this computer when he's home but I need another few hours to try to complete this (the house is just too cold late at night to work on it). He went to the Hobbit again this afternoon, giving me a fair slot of time.