Can you see the screen on your computer? Then the video card is working.
I'd suggest downloading the latest ATI
drivers from
Advanced Micro Devices Inc. (NOT the Catalyst Control Center - just the drivers).
Then, uninstall the ATI stuff through Control Panel...Programs and Features...Uninstall a program.
Then, re-enable the video adapter.
Then, install the freshly downloaded drivers and all should be well!
Good luck!