I'm not sure what you're talking about. Problem is players like wmp do not have much in the way of codecs that come with it. That's why you need to downld other codecs for it to play the other formats of video. Personally I think wmp sucks (xcuse the language.) That message you saw is a WMP error directly out of their own error codes. I can find a link if you like but I don't think it's necessary. Imagine if you use a player like VLC instead you'd never even have to think about this.