I am trying to backup some discs for a friend. They are 90210 episodes that were recorded from tv and converted. Most of the discs work fine, but I have a few that just give me errors about 80-90% through disc. I have cleaned them all and they don't have any major scratches. I have tried several burners too. I have tried decrypter, nero, roxio, clone dvd. Nothing wants to work. What other programs can I try?? BTW the dvds I am backing up are on some brand I have never heard of, DataWare. I am using Verbatims as I always do.