The best option to totally uninstall McAfee from your PC is to use the official McAfee Removal Tool (MCPR) that McAfee provide on their website.
https://download.mcafee.com/molbin/iss-loc/SupportTools/MCPR/MCPR.exe
.
.
.
Standard Disclaimer: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.
.