Overlapped i/o error message

I’ve been burning DVDs for several months now, without a problem. The other night I tried to burn Are We There Yet…got an overlapped i/o error message from DVD shrink. I downloaded AnyDVD, then it worked fine. I tried to burn Saint last night…got that same message at 97% analysing. I figured that with AnyDVD, I wouldn’t have a problem, but apparently I did. Then, I used DVD decrypter, saved the files in a folder on my desktop entitled Saint. Now, when I try to access the files through DVD shrink, I get another message: DVD shrink encountered an error and cannot continue. Failed to open file “C:\WINDOWS\Desktop\saint\VIDEO_TS.VOB” The system cannot find the file specified. I would be so thankful it someone could help me out here. What am I doing wrong?

The disc could be copyrighted or scratched.