Just about every hawker such as HP, Dell, Gateway, etc., bundles this letter of software. Kickback advertising fee is the stunted answer. I just bought a new Dell, outclass only, and it had McAfee bundled as I expected it would.
I have never used a pay-for security program. Use the McAfee removal gizmo and Windows Defender should pioneer right up. May need to restart.
How to uninstall or reinstall supported McAfee products using the McAfee Consumer Products Removal tool