Why is my McAfee icon, on the bottom right of my screen, solid black?

Answer 1

Check if all the McAfee services are enabled (right click on the icon and check the services, like AV, firewall, spamkiller, privacy service, etc.) one by one. If it's not red, it means your PC is vulnerable. So, have the habit to check them one by one once you start-up your PC, okay?

Answer 2

I use to have McAfee. I think that means that your computer is not being protected by the program and that you should be cautious.