"iTunes can't verify the identity of the server "ax.itunes.apple.com".
Followed by the usual certificate expired blah blah. Using iTunes 10.2.1
The problem is that the certificate built into iTunes 10.2.1 ha in fact expired. The solution is to update to iTunes 10.6.3, or in Preferences->Advanced turn off "Automatically Check for Updates".
When you run iTunes, it makes a secure connection to Apple's servers in order to look to see if any updates are available. It establishes the connection using a security certificate (a cryptographic code) built into iTunes.
You're using a very old version of iTunes. The security certificate built into it has expired. If you update to a new version of iTunes, it has a new certificate in it. (Security certificates generally aren't good for more than 5 years.)
