You didn't mention if it was a new install or if it had previously worked for movies. Either way, uninstall and then reinstall the software and then check for and install updates and try things again.
Edit: While your at it, might as well uninstall the drivers too so they can reinstall just in case that's an issue.
Bingo. Right on. Best answer so far.
New DVD drive plugged in, crashing during playback...... reinstalling the Cyberlink Power DVD software should be the first thing you try.