Ad-Aware free
Ad-Aware free
http://www.lavasoft.de/software/adaware/
Spybot
Spybot
http://www.safer-networking.org/nl/spybotsd/index.html
SpywareBlaster
SpywareBlaster
http://www.javacoolsoftware.com/spywareblaster.html
SpywareGuard
SpywareGuard
http://javacoolsoftware.com/spywareguard.html