1. Firewall: Jetico Personal Firewall, anti-virus: AAPEC, I believe Kaspersky is the best, anti-spyware: Ad-Aware SE, Spybot S&D is good too. 2. JPF: disk space 2.13 MB, RAM 6.4 MB. I run a Ad-Aware check only when needed so its resource usage is not important for me (around 30 MB while working). 3. I don't like "all around" programs. Maybe because I have seen only some Norton security package (I don't know what version) in action and my impression was it is just a "resource hog". As an anti-virus i have the Avira AntiVir PersonalEdition Classic (free) installed, but I seldom use it, because I don't visit/download anything "funny". Low resources requirements are essential for me, I think it's because I grew up on 386sx with 8 MB RAM, manually configuring it to get a few more bytes of free memory for loading the mouse+sound driver and some game simultaneously (hmmm Cannon Fodder ). I could just repeat what Zelig said in post #2. I have never seen a virus/spyware on my computer.