I'm trying to play some video files on my computer (ogg, mpeg, etc.). They all play in windowed mode. However, whenever I go full screen, the screen goes blank. I can still hear the sound from the video, but the screen is blank. I didn't have any problems with playing full screen video before. This problem started happening a couple of months ago. It happens with media player classic, powerdvd, and intervideo windvd. I have no problem playing video in full screen using vlc player and windows media player. However, I really, really want to use media player classic and powerdvd for full screen video. I even reformatted, but it didn't solve the problem. I ran a hardware diagnostic, and everything passed. I'm frustrated and out of ideas. I'm running a Thinkpad T42, Windows XP Professional SP2, ATI Radeon 9600 (w/ 64 memory), and 512 ram. Suggestions? Any suggestions are GREATLY appreciated.