I believe it's the Intel onboard that is the problem......Web doesn't have that.
He does have the computer from hell though.....
If you want to give it a go Steve, NVidia replaced their newest driver already and it might fix your problem. With your luck the chances are remote, but what the hell.
ftp://download1.nvidia.com/Windows/91.33/
Utilize the new control panel to fine tune your graphics.