One of my pet peeves is phony security warnings by e-mail, or masquerading as pop-up warnings on your computer. By the way, if you are getting pop-ups, your machine is already compromised.
I am going to show you a couple of e-mails from my Junk Mail folder as an example of e-mails you definitely want to delete without opening. They are images are jpegs, so the links are not functional.
Lets look at the first one. Click on the image ...