Computer was attacked TWICE today by Fake Alert virus while searching for pictures of art from Mali.
The first time, I clicked the X on the box that popped up to tell me that I supposedly had a virus. I got virus files in my computer this way.
The second time I just used the Task Manager to kill the browser without clicking anywhere in the browser window. No virus files made it into my computer.
It was interesting to have it happen to me. I've removed several of these infestations from client computers this year and I thought they were being infected because they weren't savvy enough to avoid the attack. But, it doesn't matter if you are tech savvy or not. I was using Chrome, had Flash and Java updated, and I have Windows patched. You just have to click on an unlucky link.
My advice is Don't Click on ANYTHING after the first fake alert pops up! Use the task manager (ctrl+shift+escape) to end the browser process without touching(clicking in) the browser window.