Apparently there are several root kit 'undoers' out there and they are free. How big is this? I mean, I know most of us have a firewall and AV program, but root kit? I know there was a big stink when Sony did their thing with the CD's but is it still a big deal? I've seen root kit revealer and Sophos Anti Root kit so far and both are free. Are this important in a anti-malware arsenal or not? I don't know, I'm just curious.