I have asked this question recently but unfortunatly got no reply but my problem is driving me Maaaaaaad!!!!!! My p.c ( any program ) won't play the video part of mpeg files (plays sound o.k ). I have used system restore, uninstalled recently installed programs,searched for missing codecs.......everything except re-installing windows and I don't think that will work either as i get the feeling it is due to something that is already there as opposed to something that is missing i.e a conflict of some sort. I am afraid to remove suspect codecs as I might do more harm than good............Pleeeeeaaaase anybody help. I am at this computer thing for nearly ten years now and they still do things to me that makes me want to pick up something heavy and smash them to pieces.