I think i have the same Problem - But another Video Card.
Nvidia GeForce FX 5700LE.
There is upcoming a bluescreen (most times when i am in windows, not in games) saying that the Graphics Hardware was not probably controlled or programmerd by following file: nv4_disp
in english translated there is something standing about relooping (endlosschleife)
i will try the solution with regcleaner and totally uninstall or something else...
if anyone has a 100% solution for this - please contact me via ICQ AIM OR e-Mail
icq: 175059151
aim: nplmxrtsxlon
mail: NPLMxRTSxLoN@aol.com