[MysticLlama]

The easiest way to not get this is to either close the popup with alt-f4, or right click the browser window in the task bar and close it. Killing the process will also work, or just rebooting.

Hitting the X on the popup doesn't work because it's part of the image and the window is drawn without an actual close X on it, so then you're clicking on the malware.

I've had it spring up a time or two and haven't had it take hold.

The important thing is to get your hands away from the keyboard and be careful about what you hit, even hitting the space bar can let it execute.

And always run an up to date system obviously.

I haven't seen this pop up in quite some time. I run MS Security Essentials because it works pretty well and it's lightweight. I went years without running anything with no major issues. 99% of the time, no matter what someone says, they clicked on something.