Is this an old accelerator or is it a PCI card? Try to disable onboard in the bios. Also, you may want to try a clean driver install. Basically, go into desktop properties the display, advanced and change the adapter type. You want to set it to standard PCI graphic adapter (VGA). Then either find instances of the PCI cards driver files (MAKE SURE YOU KNOW WHAT YOUR DOING HERE!!!!) from the system files and the registry. If your unsure, look for a driver cleaner for your particular card. After that reboot. Oh, and yes the display will look like crap. Thats because your using a standard graphics driver. Now that you've completely removed all traces of the driver, set the display to standard graph drivers (VGA, generic one) and, if applicable, disabled the onboard in the bios install a downloaded driver for your card. That should do it.
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