My Security Shield is a new fake Antivirus. This rogue drops files on the system and detects them as infected to scare users; files are filled with junk data and do not represent a risk. It replaces Security Master AV, My Security Engine, Security Guard, CleanUp Antivirus and Security Antivirus (family link)
My Security Shield comes from fake online scanners and porn sites
If your PC is infected with My Security Shield use MBAM to remove the infection.