|Have you reinstalled the video driver from the original CD? Or if you don't have it, go to the manufacturer's website & download the driver install. |
The built-in 'automatic driver finder blah blah' thing never works right - if windows had the slightest clue what driver to use, it would have done it already.
If that doesn't work, then the card could be toast, try it in another computer if you can.
And only hard reset your machine as an absolute last resort - when you don't let it shut down properly, things get corrupted...!