Do you have a McAfee product installed it appears so? That is go to control panel and programs and features and see if any McAfee programs are listed. Post them here. If any are McAfee security scan plus remove it as it is a marketing tool and might be causing this.
open McAfee security centre ie click on the McAfee shield and navigation and subscription and post what it says.
I assume learn more does not get rid of the popup?