fchan

When I realized I was being redirected to a dangerous site, I powered off my computer to try to stop any malware from getting onto my system.  Then I ran my Norton application; it found nothing.  But I did notice that it said it received an update about the same time.  The next day, while visiting a totally unrelated site, my firefox suddenly tried to redirect me to that bogus "personal scanner" again.

That means I have a trojan on my system.  I got it from the virus here.  And Norton did not find it during the scan.  I suspect that the malware told Norton it was okay when it loaded the trojan, and Nortan has accepted it.