I've just gone to watch an AVI file and i have no picture but i do have the sound i tried playing it in VLC and Media Player. I tried to some others that i know play properly and thats the same no picture but i do have sound. I opened the file in virtual dub and when i try to play it, its sayin no audio decopressor could be found but if i skip through it shows the picture. Any ideas whats happened its been fine up till now?