Perhaps it does explain something for me. I run Webroot Spy Sweeper a couple times a week because spyware seems to show up with regularity. Once, a back door trojan showed up. I do use IE occasionally, now I wonder if it has been the source of a lot of the crap that I have to get rid of with the Spy Sweeper.
try the free
http://www.ewido.com
.
you won't believe what it finds!
also, keep using your pop-up blocker....
and I STILL like spybot search and destroy.