Problem with a drive

Okay, so I wanted to install Alcohol 120 on a Vista PC, but it turned out to be an older version not capable with Vista. everything seemed good untill it asked me if I wanted to install a driver whose publisher was not identified. I clicked Install and the next thing I know, I am looking at a Blue Screen. So I restart, and when I log on in Safe Mode, the blue screen comes on again, in about 5 seconds. Restart again, and tryed the Vista CD. I got to the repair menu, chose system Restore and as it turns out, there are no Restore points! I tried deleting the driver registry entry in the regedit that was on the repair menu, but it is the regedit for the DVD not my C drive!

What can I do to save my computer?