Be advised that I have recently had trouble getting my latest version of iTunes to interface with my three year old iPod. After much struggling, the local Apple store suggested that my Virus protection (Avast) was the problem. They recommended I download new versions of my virus protection and iTunes, disconnect from t'internet, delete my virus protector, delete iTunes, then re-install Itunes from the file downloaded and finally re-install my virus protection before re-connecting to t'internet.
It worked!
P.P.