having a strange problem with my graphics procccessor which is an ATI radeon x700 pro. when i play a video, whether its a avi file or a dvd or whatever, i get these pixely vertical lines down the picture. I have the k-lite codec pack and the latest updates for it. The problem seems to come and go, but i have no idea whats causing it. Anybody had a similar problem or got any idea what it might be? many thanks in advance.