The Best is to keep that "Stuff" from getting in -- start with this good advice:
So how did I get infected in the first place? - http://www.computercops.biz/postt7736.html
MRU-Blaster - http://www.wilderssecurity.net/mrublaster.html
Spybot - Search & Destroy 1.2 - http://www.safer-networking.org/index.php?page=download
And of course having a good firewall and anti-virus etc.
Again as in many other things of life -- prevention is always better and safer than having to deal with "The Cure"!