I have been using DVD Decrypter and DVD Shrink along with the instruction shown at the link below to back up my DVD's http://home.comcast.net/~bbmayo/reccomended.html I have only made 8 back ups so far but everytime it works great for me. No bad dvd's yet. My question is about step number Deep Analysis. I have only been able to check the box one time. All the other times when I go to the quality setting tab I'm not able to check the box for deep analysis. Can anyone tell me why?