Can't download Ipod updater due to "security settings"

Hi there

I can't download the updater software for my Ipod, as when I try I get a message telling me that my security settings prevent me from doing so. I've seen a few posts on different sites with other people having the same problem, but no actual absolute fixes. I've checked my trusted sites etc, and I'm sure it's either to do with the latest Windows update or something to do with my firewall (Zonealarm).

Can anyone help please?

Thanks