When I try to back up these 2 dvd's it always locks up my computer in the read mode. I have read ahead turned off (tried it both ways). I am using DVDfab Gold, ver. 18.104.22.168...So far these are the only 2 that are giviving me troubles. It also takes along time to scan media on these & sometimes takes several attempts (on its own) to do it. I have also tried running "enditall" just in case some other app was conflicting, all with the same results, my computer totally locked up...Any help would be greatly appreciated..Thanks!!!