Weird thing here. For some reason it seems to attempt to either check or install a simple driver during the windows install and the hardware issue prevents that. As for the other PC, it may be using the default windows drivers. I find that often if the GPU has hardware issues, the drivers just *poof* disappear and the card then runs off the installed windows driver. If you want to check it, update the driver and see if the card freaks out. Should either black screen when booting or artifact heavily. Doing a safe boot to remove the drivers can pull that pc out of its GPU death throws.