Q: I get the error "unable to load data class info from sync services" and eventually itunes freezes-will anything in this article help?

Hello there brigidfromca.

Messages can always be pretty daunting when we're not sure where to start. I was able to locate the following Knowledge Base article that discusses the very message you're getting:

iTunes for Windows: "Unable to load data class" or "Unable to load provider data" sync services alert

http://support.apple.com/kb/TS2690

It is a pretty thorough document with multiple steps to review, but looks to be great place to start for a resolution for you.

Thanks for using Apple Support Communities to reach out to us for answers.

Cheers,

Pedro D.