I run: Zonealarm Pro (linked to router. if Za is not running on the PC the router will not allow any access to the net on any port) Adware Spybot AVG free (thinking of going Pro) Firefox 1 with Adblock and Flashblock IE is set up on Max secutrity and only used to access Windows Update. Windows Xp Pro running Service Pack 2. (no software probs at all) and you know something? no spyware, virii or trojan's get in. all prog's are updated on an nightly (AVG) or weekly(Adware/Spybot) basis.