Question - Someone said something about using Zone alarm. If he is running Windows XP, Why? The built-in firewall is good enough and does it's job. Anyone who says otherwise does not know what they are talking about.
Also, this McAffe v Norton crap, It's 6 and half a dozen. They both do their job fine. I personally have problems running McAffee on my network, especially as it decides to block ports without asking me (why do i need this when the firewall does it for me?). It's a matter of personal preference. Even AGV is looking up now (Although I still wouldn't trust it 100%)
I personally prefer NAV2005. I have used it since version 2001 and never had a problem.
Does the job for me (For £8 OEM as well