I've been removing viruses since Win95 and at least 60 per cent were infected with McAfee installed, yet maybe only 20 per cent that had NO anti-virus installed at all. The rest had Norton/Symantec and later, Microsoft's lame program. And then the rest of the apps fill in the other blank spaces. I am convinced McAfee is a beacon to malware who probe for its open ports for updates to identify it then attack the turdware, then compromise the system, since it prolly has root/admin.
CLamWin, Malwarebytes and Sandboxie for questionable programs from net for testing will server users well.
MSI X58A-GD65, email@example.com, EVGA 660 GTX SC SLI, Neutron 240 GB,2.75 TB Spindle Storage,ASUS DVD-RW, 6GB Patriot, Win 7 & 8.1 & Kubuntu Triple Boot, ASUS VK278 on DisplayPort.