If you use Windows 2000 or XP
- Rightclick the Windows desktop and choose Properties from the popup menu
- Click the Settings tab and then click Advanced
- In the next dialog box, click the Troubleshoot tab
- Under Hardware acceleration, move the slider one notch to the left.
- Click OK as many times as needed to return to the Desktop.
If you use Windows Vista
- Rightclick the Windows desktop and choose Personalize.
- Click "Display Settings".
- In the Display Settings dialog box, click "Advanced Settings..."
- On the resulting dialog box, click the "Troubleshoot" tab.
- Click "Change Settings"
- You'll probably see a User Account Control message box asking for permission to continue. Click "Continue"
- On the resulting Display Adapter Troubleshooter dialog box, move the slider one notch to the left.
- Click OK as many times as needed/close any windows that opened along the way, and return to the Windows desktop.
After changing acceleration, re-test
After setting the acceleration back, repeat whatever whatever caused the problem in the first place to see if it's now fixed.
You can either reduce the acceleration a notch at a time until the problem goes away, or move it all the way to the left, test, then if that cures it, try moving it to the right again until the problem recurs, then back off one notch.
If changing the video hardware acceleration solves the problem, it's a signal that your computer's video driver isn't quite perfect. Check with the manufacturer (of the video system or the computer) to see if updated drivers are available. Even if your PC is brand-new, it's probably been several weeks or months since it was built and video drivers change almost daily.