I am trying to figure out why a HD DVD will play just fine on the new laptop, but won't on the new desktop. All I get when trying to playback on the desktop is the video loading message that never goes away. What info is needed to start the troubleshooting? Both are running Vista, the desktop is Vista Business Prem, the laptop Vista Home Prem- the same version of media player, 11.0.6000.634.

TIA
Anty