There is another command you should probably try first to see if it fixes (System File Check). Repair overwrites your current windows and if I remember right, really messes with your installed programs...
"start", "run", then type
try that and see if it fixes everything.
Silly question, but can you not restore back to before the drivers were installed? Once you get everything working right, I would suggest getting "Norton Ghost" and create an image of your setup. Then no matter what happens, you can always go back to that point.