saran008, there is a thread here
that focuses on your problem. Most of the fixes revolve around creating a custom resolution via nVidia's control panel [don't know if this will work with ATi]
There is another thread here
that fixed it using hardware acceleration. To do so:
- Right-click desktop > click Personalize
- On the lower left click Display > top left click Adjust resolution
- Click Advanced settings > click Troubleshoot tab
- Click Change settings
I did not post the answers myself and instead gave you the links so that you may redirect your questions there if you wish.
Hope this helps!