On the subject of script blockers and malware/spyware etc I only use NoScript as a firefox plugin
http://noscript.net/ I've not had a single result from my spam blocker (ZA PRO) since I have been using it.
I used Spybot & Adaware for ages but got rid of them in the end as they never showed any threats to my system.
How do people rate Window$ firewall (sp2) comopared to the third party versions like ZA?