I just bought my first DVD rom drive Liteon 163. I noticed in the drive property (Windows XP) that there is a tab called "DVD Region". In there, it stated that I have not selected any regoin and still have five times left to change region.
Must I select a region? I previously bought 2 DVD movie. One can play and the other one can't. PowerDVD gave me the message someting like " invalid file format...".
Must I set a region? If so, why the other movie can play?