http://www.spychecker.com/program/cwshredder.html
i am not sure if this is the problem but some programs like coolweb are not detected by spyware scanners, or if you have a old build of adaware, or spybot, they may not be able to detect the new spyware that is out.
http://enigmasoftwaregroup.com/jump23.shtml
that page details my opinion.
download the most recent spyware scanner often, adaware is up to build 181, not sure of spybot, or the others. but if you search for the name of yours, you can see if there is a new version out.