All my movies were working fine until a few days ago. Audio still works fine, and all codecs are installed. I decided to give windows media player 9 a try, including the windows media codec pack. I'm not sure if this was the cause of the problem, but now more than half of my movies display a solid grey screen with the audio portion working fine. Same problem on all players, including BS, Divx, WMP and WinDVD. And yes, I uninstalled and reinstalled the klite codec pack. If anyone has a clue, I'd be grateful.