I used to use IE 6 for my web browsing, but a while back, I started frequently getting a pop-up stating that my computer was at risk. It looked like a normal system pop-up, but I was wary, so I closed it, and then immediately saw a new browser window appear, with instructions to download a security program. I didn't want to do that, so I closed that, prompting one more pop-up, which I closed, however upon closing the third pop-up, IE closed. This happened a lot, so I downloaded Firefox and was happy that it didn't have the same problem.
Except now I think it's starting to. My girlfriend was using the computer, and noticed a pop-up which led to a download screen for some security program. She didn't pursue the download either, but it's a bummer that it's happening again.
I don't have any more info, because I haven't seen it myself for a long while. Anyone heard about this?