Popup virus warning
I have been receiving a popup virus warning, claiming to be from Apple, warning me my system is infected. Trendmicro, my virus protection says my computer is clean and has no virus's.
Any idea what might be causing this and how to stop it?
I do not have Apple Care so I know something is funny.
Using a MacBook Pro with MacOS High Sierra 10.13.6
I've attached a screen shot of the warning.