Could you elaborate graphics messed up?
Anything in event viewer?
Have U tried uninstalling the game ?
Ok, let's see :Try disabling your video card from device manager. Restart in safe mode. (this will only leave the VGA settings)see if screen is the same. If not, then its your video card...Try updating drivers...
Also try changing to a lower resolution in safe mode.
Go to Start>Run > msconfig
Click Diagnostic startup with basic devices and see if you still get the blank screen.
Have you tried a System restore to an earlier time, if not run system restore! Start>Run>msconfig click System restore, because that's a sure way to go!
If I'll think of anything else I'll let U know...