Security Guard 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
CleanUp Antivirus and
Security Antivirus (
family link)
Security Guard comes from fake online scanners and porn sites
If your PC is infected with
Security Guard use
MBAM to remove the infection.