I have a piece of adware installed on my computer which displays adverts for McAfee products. The adverts pop up & displays a message such as "keep scammers off your phone" with a picture of a laptop. There is a close button in the top right-hand corner of the pop-up window, but this doesn't work. The only way to close the window is by clicking on it then using Alt+F4.
I am perplexed to see a web security company advertising in this way. Customers install internet security products to get rid of software which behaves like this.