I work in the computing industry and deal with viruses everyday. I strongly advise against Norton because it is very heavy on resources and can destroy you OS - once on it can be hard to take off. I also see a lot of computers that have become infected with viruses when runing Norton.
We used to use Panda Antivirus but the recent release (2005) has given us problems with 50% of the machines we installed it onto having to be re-formatted.
Computer Associates virus scanner, although now free for the first year, is not very reliable.
I would recomend Trend Micro Internet Security or McAfee. We have also been using Bullguard which seems ok but has yet to proove itself. AVG is good because it is free, but for a reliable Virus Scanner you will have to pay.
Most internet users can get away with the MS Windows XP firewall installed, as long as they have a good virus scanner.
Tony Wilson
March 2005