My sites don't display correctly because there's a spyware called Servedby.Advertising.com in my computer. Every site I go to, that Servedby.Advertising.com diplays as if I was going to that site, and then holds and times out. I tried Spybot, Ad-aware, and hijackthis. Only Spybot finds it, when I fix it in spybot and go back to firefox or explorer, it does the same thing tries to go to Servedby.Advertising.com and when I close it and go back to spybot, spybot finds it again, and so on. So I can't remove this spyware out of my PC, anyone has any suggestions?

Turn off System Restore. Reboot into Safe Mode - run Ad-Aware and SpyBot S&D. Reboot. Turn System Restore back on. Post back if this does not help.

some google hits, you will have to do some research to eradicate this. http://www.google.com/search?hl=en&lr=&q=Servedby.Advertising&btnG=Search