my boyfriend did something, and now we can't play any video file using windows media player. I think I need to download and install a codec but I don't know which one. Right now I can only hear audio on all my video files, the screen is just black. I remember a long time ago on Matt's forum, somebody recommended me one and it was really good. I don't remember, of course, where the link was to, but I think it might have been a site ending with .sk - but my memory could serve me wrong.
Can anybody help me out? I don't need the exact one I had, but something that can solve my problem.

did it help ?

You could try VLC, Christina. I find that lets me play files that aren't playing properly with sound and vision.

I know, I have VLC and it plays the files without problems. But I wanted to get windows media player to work because the missing codecs (or whatever it was) caused me to not being able to vreate chapters in NeroVision - well I could vreate but not see where I created the chapters, and I couldn't watch the live streams in wmv format, e.g. I couldn't watch the Olympic matches. I have re-install windows now and I can play files again in windows media player