These days it's just common sense to have an arsenal of some kind to battle against Viruses, Malware, Spyware and all that crap you can get from just about anywhere on the net. (Yes, it's actually that serious now.)
So go ahead and list your arsenal.
Here's mine:
Hijack This - Scans hidden files, very rarely used
Sophos Anti-Rootkit - Anti-Rootkit, used weekly
Malawarebytes' Anti-Malware - Kills viruses, worms, trojans, rootkits, dialers, spyware, and malware, used weekly
SuperAntiSpyware - Kills Spyware, Adware, Malware, Trojans, Dialers, Worms, KeyLoggers, HiJackers, Parasites, Rootkits, Rogue Security Products and many other types of threats, used weekly
Spybot Search & Destroy - Anti-Spyware, used weekly
AVG Anti-Virus - Anti-Virus, used monthly
Well, that's my arsenal, and I say that I'm well protected.
What's yours?