Does anyone know how to fix this pop up? I'm trying to help a friend and I ran multiple programs on her computer to see if I could stop this pop up from coming up. It's one of those "your system is compromised, call an 800 number, etc.' pop ups. I ran 3 different programs that are supposed to catch stuff like this. I ran a full system virus scan, I uninstalled FireFox and reinstalled it (thinking maybe one of the FireFox system files was corrupted). Nothing works. I left her place about 5 hours ago and didn't hear anything. She just texted me and said it came back. :-( The only constant is that it ONLY occurs when she's using FireFox. Thanks. Dave