no spyware, yet still get random pop up search engines

so, i recently installed a new hard drive after my old one crashed (this new hard drive was sent under warranty so same thing)

and ive been reinstalling the software and whatnot, the first two things being adaware and mcafee virus scan

now, ive noticed that every once in a while (more than that, at least once a day) i get a website just randomly popping up

its usually sites such as http://alltheweb.com, http://teoma.com, http://wisenut.com

i have used adaware multiple times and it comes up with nothing, ive already made sure all the spyware dat info is updated and the engine updated, ive also used a program called bazooka and cannot find anything

i tried scanning with mcafee, no virii at all

what is causing these pop ups?

i have used hijackthis, used the tutorial on this website and still found nothing malicious or even spyware like

please, this is pissing me off, just looking to see if anybody could provide some sort of hint as to just what is actually going on here

thx

 

try using a couple more spyware removers like spybot and spysweeper

SpySweeper

SpyBot