MaFia JaK--There are many spyware detector/blocker tools out there. Here is a recent test on several.
http://spywarewarrior.com/asw-test-guide.htm#detections
But list of other tools goes on and on.
http://www.windowsbbs.com/showthread.php?t=31695
Of the ones you mention, I would be careful using about:buster and CWShredder unless you know you have the problems they were designed to fix. CWS is also getting out of date, since the developer felt it had gotten to be too much work.
You should be sure to look into the Security and Privacy settings of Internet Explorer including using Restricted Sites (IESpyAds will make that easy for you
https://netfiles.uiuc.edu/ehowes/www/resource.htm ).
And you could consider having a HOSTS file.
http://www.accs-net.com/hosts/
I assume you have an antivirus program. And never open email from someone you do not know!!