Foolishly, I installed a codec bundle from the internet, and now when I play my mpg files, the audio is out of sync with the video (the audio appears to be faster than the video). I know my mpg's play fine usually. I am using Power DVD XP for playback. I have tried uninstalling the various parts of the codec bundle, but it doesn't help. Does anybody know which codec is likely to be causing this? I guess I can reinstall power dvd again, and that might fix it. I appear to have a lot of codecs installed now, but I don' even know whether it's the video or the audio codec that's misbehaving. It's codec hell! I've had this before after installing some codecs. I don't remember how I fixed it previously - probably uninstalled/reinstalled something.