1. Get Revo Uninstaller - This could also unistall Windows BLOAT - see its Options.
2. macafee is extrememly persistent. Get WinAutorun from
https://learn.microsoft.com/en-us/sysinternals/downloads/autoruns
It a portable app so no install needed. Just run Aurtoruns64 as administrator.
Look for macafee, uncheck and delete.
Do 1 restart then 2
BE CAREFULL when you UNInstall things !!