it sounds like you got spyware from the so called "Spam King" That The USA Cyber Bacon recently busted , thou if people continue to visit this site (whatever it may be) will get spyware coz it was under some agreement that he can put spyware on peoples coms if the use vistis his site
use ad-aware or spybot , update the crap out of it and see what happens , if that doesn't work , try microbastards antispyware beta or look on the ms knowlege base for an article on the issue
can't you just use firefox and not ie , the latest version is 1.03