he ment spyware doctor:

http://www.download.com/Spyware-Doct...-10651631.html

its not free though and not that good as well.

I recommend avira ( the presonal classic edition is free and powerful ):

http://www.avira.com/en/download/index.html

Or AVG is not bad as well, also got a free edition:

http://www.grisoft.com/doc/31/us/crp/0