Hi folks, I'm running on a laptop with modest CPU speed and have decided to get really light with my software. I'm about to do a reformat with an nLited Windows XP installation and am looking for help wrt firewalls but primarily antivirus. My plan is to install Ghostwall for a firewall, and I'm thinking of ditching a live antivirus all together and just have an on-demand one available for when I download a suspect file. Two questions: A) Am I mad? I just cant justify giving away performance to an antivirus package anymore, since I don't download viruses or run insecure services. I mostly use my laptop for programming (Eclipse), and e-mail / general internetting (K-Meleon - so light and fast!) B) If I'm not mad, what scanner do you recommend for on-demand purposes? C) Any general suggestions for someone trying to cut down on RAM and CPU usage? I don't really keep up to date on security software so wouldn't know if there's a better solution under my nose. Thanks for your help. On my main (faster) desktop system I use Avira Free and Comodo personal firewall based on your suggestions months ago and have been happy with them.