Late in August McAfee Labs discovered a Fake Antivirus program that claims to detect infections and displays alerts to scare users into purchasing protection. The program is not genuine software and has nothing to do with reliable and effective AV tools. As soon as the victim downloads Win 8 Security System, it pretends to scan your computer and shows a grossly exaggerated amount of nonexistent threats. It is typical for cybercriminals to piggyback on the highly-anticipated release of any latest technology to take their malware to new heights.
Source: https://thehackernews.com/2012/11/beware-of-fake-antivirus-win-8-security.html