Check "Device Manager" for the video card provider/manufacturer, driver date and driver version, then visit the manufacturer's site and see if there is an update to the driver. There should be one...Download it and install it.
Hope this helps.
I have dual booted my Toshiba Satellite 1800-400 Laptop with XP Pro and Windows Advance Server 2000, However The Windows 2000 Drivers that Toshiba provide will not work, and the laptop is stuck at 800x600 with 16 Colours. Will drivers for Windows 2000 work with Advance Server 2000?