Quote from baller1069:
the computer isn't even booting
This exact thing happened to a buddy of mine after he downloaded and installed MS recommended (Windows Update) video drivers for his card.
They fried the card. Completely. To the point the PC wouldn't boot at all. Not even a bios beep so he couldn't run his CD based recovery media.
The only thing that worked was buying a brand new card and replacing the old card completely.