Not sure. Try also installing VLC (also free). VLC is a video player. I think (haven't done this part myself) that Handbrake can use some of VLC's installed components to help get around the DRM which is installed on almost every DVD. I'm not sure if this pairing between Handbrake and VLC is automatic, a setting in Handbrake, or if VLC needs to be running while you rip the DVD.