So actually that didn't solve the problem.
Checked it out on Google and found that it was a fake McAfee pop-up that had been added to my browser, Microsoft Edge by the Xhamster site.
Google advised to clear all history, cache, cookies, etc., etc. from Microsoft Edge, the restart the computer, and add an ad-blocker extension to the browser.
Seems to be OK now, after an hour of work.
"Hey! Let's be careful out there..."
