Using legal/purchased Nero 8 on a Windows Media Center system. Rented DVD movies play sound, but no vocals/voice. Tried different DVD's, characters lips move, but no voice heard. Windows Media Player will play the movie normally. Funny thing, I can hear the voices during the movie advertisements at the start of the DVD's play, but when it gets to the featured movie, no voice. I thought it might be a codec problem so I bought and installed Divx Pro. Same problem. Uninstalled Nero using Nero's "clean" program and reinstalled. Same problem. I'm clueless. Anyone have any ideas (other than just using Media Player)?