run the directX diagnostics program and see what it comes up with. You should be able to find it in the windows\systems32 directory (dxdiag.exe)
Also make sure u have the latest dx drivers
Also check your graphics card and monitor drivers/hardware are functioning ok in "device manager" and perhaps look for driver updates.
Check your monitor if u can on another computer to see if it does the same thing - if so it maybe faulty.
I have a problem when I go to full screen. The screen is full but I only see about 2/3 of the video.It is like the picture got streched This only happens in the full screen mode. I think the settings got changed but I can't get them back. I'm running Windows ME and it happens in all video players.Please any help I would be greatfull.Thanks