I don't run virus protection on my Windows machines, but I am a stickler about automatic updates. At work, where I manage a few hundred Windows machines with v

I don't run virus protection on my Windows machines, but I am a stickler about automatic updates. At work, where I manage a few hundred Windows machines with virus protection and updates (managed through WSUS), I'm able to see whenever our virus scanner gets a hit. It's almost always the same users doing the same stupid things. (They are all running in limited user accounts though, so it's usually only their own accounts they damage). Linux machines are generally taken over through ssh key attacks, cgi vulnerabilities, or social engineering (this happens more than Windows machine takeovers at my workplace, unfortunately).