pugwash2004

For a business network environment there is usually a version with a central server that distributes / installs the software, for AVG its AVG Anti-Virus Network Edition this manages updates for the definitions and the software and you'll be able to see if any machine is out of date. Looking at the price for that version it may save you some cash as well. I use EPO from McAfee to do the same thing, for that I use the EPO Agent installer from the GPO which would then install the software from the central repository automatically.

I've checked my Technet account and the only XP SP3 I can see is the RC2 version. Searched all the downloads and can't see any mention of the fully released version anywhere.

For machines I fix for family and friends I usually install Zonealarm basic mainly because its free and usually its to get rid of Norton they got with their machines. For myself at home, I have to use Pro because Basic blocks VPN access to my work network due to its limited features. ZA appears to have gotten more stable recently, possibly because of the buyout, the older V6 version used to crash on me quite often overnight and kill any offpeak downloads I had but the new V7 has only crashed a couple of times since I installed it.