I believe when I recently downloaded Adobe Reader to my wife's computer I also downloaded the McAfee Security Scan tool.
I tried all the recommended methods to remove this bugger.
(1) normal Windows -> Settings -> Apps -> Uninstall....did not work, all it did was open a splash screen that would only give me a link to the McAfee website to purchase a subscription...
(2) I downloaded the McAfee removal tool...when I ran the executable, it seemed like it was working, but after rebooting, as I was instructed by the program, Security Scan was still there
(3) next, I tried the Uninstall executable in Program(X86)/McAfee Security Scan directory, I ran that but all that did was open that splash screen again...
(4) The Wooden Stake...It appeared to me the this program was reinstalling itself. So, I found these (3) files in the Program(X86)/McAfee Security Scan/4.1.491 directory and manually deleted them...
McinstallerRes.dll
McinstallerRes_LD.dll
McinstallerStartup.dll
(4a) then I ran the uninstaller program in the Program(X86)/McAfee Security Scan director and the uninstaller removed the pesky little bugger...wooden stake, silver bullet, and some holy water