Mega Antivirus 2012 is a fake security application. It displays fake infections to push users into buying a license.
A bug in the license.pwd path prevents registration: This version is dropped in C:\WINDOWS\addons folder. But the license.pwd path is hardcoded to the previous version: C:\WINDOWS\RemVir folder
If your PC is infected with Mega Antivirus 2012 use MBAM to remove the infection.