Are you having authorization problems trying to play iTunes files? Unfortunately purchased files downloaded from the iTunes Store can only be authorized to work on a maximum of 5 computers at a time. If you attempt to go over 5 computers (Macintosh or Windows), then you will get an iTunes authorization error. But don’t worry, there’s an easy way to deauthorize computers on iTunes.
TUTORIAL: How to Deauthorize iTunes On Computers Connected to Your Account
I click Autherize and it say that this computer is already autherized, but it will not let me transfer the music. How can I fix this?