Clear & Reset the data
Open your usual browser and navigate to its settings. On Chrome, as shown below, click on the three dots to the right of your account avatar. Click on “Delete browsing data”
Clear and reset your browser(data). Clearing stored data and resetting your browser might be enough to get rid of the fake McAfee virus pop-ups. https://community.zipato.com/topic/42058-for-support-61-1800-592-260-how-to-get-rid-of-mcafee-scams