Thanks g but the issue is that NIS gives the alert via the exclamation mark in the system tray & subsequent details window after clicking but there are no available updates from Norton to protect & hence clear the alert.
Yup, have the same "problem" here atm. Warns of the problem, but trying to update definitions gives the same response here too. What version of NIS you using? I have 2005 as it's a Win98 machine and 2006+ don't support Win98.