Some spyware/adware program or virus got into my system yesterday. My virus scanner (AVG) picked up two trojans and cleared them. After that happened I ran AdAware to clean off my system and found 15 items that it cleared. Then, the popups kept continuing, and my entire system was slowing down. I ran AdAware again and found 5 more items to clean. And then again a few hours later, and another 5. I assume this virus is reinstalling whatever this program is that is slowing my system and causing these popups.
I tried searching my drives to find anything that was created that day and didn't see anything suspicious. And I have no idea what site I visited that caused this. How can I get rid of whatever is doing this (without reformatting my entire computer; I don't have the system disks to it anymore)?
I use FireFox as my main browser, but the popups continue in IE.
Is there a better scanner that is available for free besides AdAware and AVG?