FYI having a 256MB of memory on a PCI card is a waste of money for that interface and chip.
Your problem could stem from a previous graphics card. Depending on what card you had before... you might not have uninstalled the previous driver properly before putting the new one in.
Also, depending on how old your computer is (given the fact you bought a PCI card... my guess is that it borders on ancient) there would be a IRQ conflict.
At this point my advice would be to:
- download Catalyst 4.10 (WITHOUT the Control Center) from www.ati.com
download and install.
- uninstall the driver via add/remove or from the ATI folder in programs
- boot into VGA mode (hold down F8 after the BIOS screen). should get you to a screen that has options to boot into safe mode etc.... select VGA
- log into windows
- run drivercleaner
- uninstall/clean all ATI (and if you had a nVIDIA card before) nVIDIA drivers.
- Start windows normally
- Do NOT let windows install drivers for the card, install Catalyst 4.10 drivers
See how that goes.
But given the card and interface, I wouldn't even bother trying to play newer games with that setup. Not enough horsepower.