Can't you tell that I meant to write Windows 8! In fact, I am running Windows 8.1. I am happy with Windows Defender for anti-virus protection and am now also running MalwareBytes Pro real-time protection for malware protection. The two apps seem to coexist peacefully. I startled using MB when I had Conduit and Scorpion infections. PS. I first tried to use McAfee for anti-virus protection. It came with my system but I found it too intrusive with my emails, calling good emails spam. I use Gmail and it already does an excellent job at segregating spam, better than anything I have ever used in the past.