he wanted a "prevention" program, not a "removal" program. in my opinion, i would use Firefox browser, remove Kazaa and not go onto any warez sites. that way you'll hardly get any spyware. simple as that.
Best adware/spyware prevention: Go to www.majorgeeks.com (I avoid www.download.com cause I've gotten viruses/trojans from there) and get SpywareBlaster and SpywareGuard (links are in my signature). Add those to AdAware and Spybot and now to Microsoft's Syware(beta), All of which are in my signature. Liz