*@#$&^(!@*&$^!*@$ Malware defense.

I've had that before, once on my laptop (Thanks, DoD....) and a couple times on other systems.

It is a PITA to remove. Install malwarebytes, after installation distonnect the comp from the net, run until it says your system is clean, (sometimes takes 2-3 times), run S+D until it comes up with no threats, run the shield on S+D, and then beat whoever opened the email repeatedly about the head and shoulders.