i have a major spyware problem,i can seem to get rid of these 2 certain popups,they popup at certain sites. the url of the popups are kpremium.com which is kazaa and the other is something like winpopupblocker.com I'VE TRIED AD-AWARE,SPYBOT,and PESTPATROL,and they still continue to popup. when i scan with those 3 programs nothing shows up,it shows my computer is free of spyware. i'm guessing this is something like an unknown BHO,can anyone help

much thanks

note: these popups tend to only popup when i click a link on a page,it would popup and at the end of their url it would have words related to the page i am visiting
thanks again