First some basic specs:
Vista Ultimate 64bit
The other day I wanted to see what Flight Simulator would look like with my new card so I downloaded a demo of it to try. It installed without a hitch and when I went to start it up, it would say unsupported video card and would just crash. I didn't really card about the game so I just uninstalled it and went on. A few hours later I went to play crysis warhead and when it started up it crashed without a reason. I tried another game and it crashed also. I tried every game on my computer and they all crashed.(They ALL worked FINE before). Every other program on my computer runs fine including the standard microsoft games like minesweeper and chess, etc.
Some solutions I tried:
reinstall graphics driver
reinstall directx and run dxdiag
I will try repairing vista when I get the os disc back next weekend.
P.S. I have 3dmark vantage on my computer and i tried running it. Much to my surprise it ran fine and my card passed with flying colors (like it should for the price heh). This is what really stumped me because up to that point I figured it had to be a directx or driver issue.
I appreciate all your time and I know it was a long post (you guys are the best )