Whenever you are assaulted by nasty pop-ups of unknown origin...

DON'T close them by the "X" on the pop-up or click "cancel" or touch ANYTHING on the pop-up itself.

Press CTRL + ALT + then DEL to bring up the "Windows Task Manager". Then select whatever the pop-up application appears as hear and click "end task"

Devious pop-ups are made in which the x and cancel doesn't close it at all but actually performs some bit of mischief.

That's the only safe way to shut down a pop-up, especially the ones that can bypass pop-up stopper and similar programs and which clearly use advanced coding.

Just an FYI,

SDAI-Tech1