The suggestion I purchase a newer software package is not a liable solution. Prior to installing the latest update for Powerdvd 7.3 Ultra the programs works so it has to be compatible w/ Windows 7. If the program didn't install or had some errors w/ crashing I would then find it more feasible it wasn't compatible. It almost seems as if a kill switch was put in the last patch so users would have no choice. The thing is we do, and I need HD DVD playback. So instead of paying $90.00+ dollars to upgrade I paid $59.99 for Arcsoft's Total Media Theater Platinum v3 which plays everything Powerdvd 9 does.