Some of those?

http://security.stackexchange.com/questions/14515/is-buzzdocks-a-security-threat

I'd try Grif's advice at http://forums.cnet.com/7726-6132_102-5098912.html?tag=posts;msg5099421 then take a look at my DNS and homepage entries if all comes up clean.

I'd also consider ejecting all toolbars.
Bob