It sounds like it didn't give you a location or name for the file? Without that, you won't be able to tell whether it's a dangerous file or simply a false positive (something that it thinks is a virus but really isn't).
For some reason, my comp refuses to connect to iTunes's store. I've tried signing up for an account, closing my firewall (ZoneAlarm), rebooting, waiting... nothing works. I can get to the online radio stations fine, but that's it.