i don't know if this is old news or not, but i just caught it today while editing my photobucket account. it's one of those that pretends to be your antivirus software finding a virus, then infects your cpu. anyway, it popped up, and i didn't recognize it so i shut down the windows i was in for IE, but it was too late. all the buttons on that pop up are "download" buttons. but it is pretty easy to fix, and there are a bunch of articles on it if you google it. i think " bleeping computer" had everything outlined with all the links and files.
hope this helps-
merry christmas-