[Thox]

I'm in pretty much the same street as Administrator: I don't use antivirus or software firewalls at home.

At work we've got two big beefy hardware firewalls, McAfee virus checking, and I personally use Spybot S&D to keep my machine spyware free. The firewalls will cut off your internet connection if they notice any spyware activity from your PC, which is great.