FWIW, I've had this problem with several kinds of media, Verbatim included. The consistent symptom remains that I can always count on getting a successful copy by uninstalling and reinstalling Nero from scratch, which takes about an hour. The first copy after this ceremony is consistently good, as are an indeterminate number of sucessive copies, somtimes zero successive copies. I'm inclined to suspect Nero, but have no solid evidence to suppor that suspicion. On the other hand Nero successfully burns CDs even after it stops being able to burn DVDs. never mind, it's a media problem.