I am using windows vista and using windows media player 11 to watch dvds. The english audio does not work when playing dvds, even though US english is the default setting and I select US english in the dvd settings. The background music plays and with one dvd I managed to hear some dialogue. Every other language that I select (e.g french, german, english for hearing impaired) works. I have tried numerous DVDs so it is not a dvd problem, and I have tried those dvds on a laptop and it works fine. So it is not an audio problem, nor a faulty dvd. Am I missing a codec or something or is it in the wrong region (I live in Australia) I dont have any other dvd players on this computer so I can't test it out that it is just a WMP problem. Any suggestions? Thanks!