When I launch WinDVD from RR, it momentarily goes full screen then reverts back to 3/4 screen. If I use the built in DVD player in RR, the screen fills out properly but video playback is jerky. I do not have this playback problem with WinDVD or PowerDVD. I would prefer to use the built in player if only the video was not so jerky. Any ideas on what to do to resolve any of this?