I have made 100 or so back-ups using DVD Shrink and AnyDVD. Recently any back-ups I have made, the dvd freezes about half way through when I watch them. There are no error messages or problems making the back-ups. Iām by no means a computer guru, but any help would be greatly appreciated. 
Where do you watch them stand alone player or the PC?
Did you watch and try them as you went along copying, or is this a sudden discography now?
What media did you use to burn them on?
Yo-
Sure sounds like a media problem to me-
Have you changed media recently? What Media are you using?
Also - ALWAYS tell us what your system and drive specs are - that way we can give you the best answers-eh!
Mike