They are secure. Two spyware removal programs (Spybot and Spyware Doctor), neither find anything. One continiously scans the computer as I use it (Spyware Doctor). Tracking cookies are auto-removed (Spyware Doctor), ActiveX plugins, etc.. are not allowed to function until I give them the all clear through Spyware Doctor. I have two hardware inbound firewalls (A NetComm NB1300 ADSL Modem and a D-Link DI-624. Both set as routers, so everything is also double-routed), and one Software inbound/outbound firewall (ZoneAlarm Pro), that checks if an executable file has changed when it tries to connect to the internet, to prevent a program spoofing as a different program)
I don't use P2P programs, or any of those stupid obviously spyware filled programs (such as DAP), Firefox is my default browser, I only use Web-based Hotmail to check my e-Mail. No Outlook/Express for me. Everything through Firefox. Norton AntiVirus 2004 for AntiVirus scanning, all-auto.
Service Pack 2 won't be installed any time soon on these computers.
They also have a bunch of hacks from GRC.com to disable things like Raw sockets, and a few other vunerabilites.
All in All. Very secure. Never even had a single virus.
Oh, and by the way, did you all know that GameSpy Arcade contains adware?