Just thought that someone might want to check this out. There are these two programs I have been using for awhile now. THey are called Spyblaster and Spyguard. They are both free from http://www.javacoolsoftware.com
THe spyguard stops your registry from being edited by potential Browser Hijackings and other spywares. SpyBlaster pervents about 98% of spyware from being installed w/o your permission. They both run in the background for live action detection. If you run Internet Explorer i would recommend you check these out. They also work along w/ firefox, though firefox is more stable.
-just thought that may interest some people.