try this:
1)uninstall your video card completely.
2)restart.
3)go back to the add/remove hardware wizard, and if your video card is listed, return to step one. otherwise, go to step 4.
4)install the most recent drivers for your video card
5)restart
6)if its still screwed up, go back to step 1
I've had this problem before... thats how it works for me... its annoying.