You’re at your Mac, doing some working as normal, and you visit on a site you have been to many times before. But then you get a pop-up. And not just any pop-up, but a warning message that says your computer is suddenly compromised. Usually phrases like “virus detected” and “suspicious activity” are part of the warning. Panic begins, what can you do about this? Luckily that dialog has a phone number on it you can call to help you sort things out. For a fee, of course.