I've had my Dell E510 for a few months. It has been playing DVD movies just fine. Now in inexplicitly just won't play them with with the Media Center player or Cineplayer. Any ideas how to correct this problem? I'm assuming it is a codec issue. I've tried a system restore to an earlier date and ran the repair option for Cineplayer under add/remove programs but this didn't help.

 

This is rather frustrating because the only reason I purchased a new desktop was to play DVDs!