Iron Defender is a fake security software (rogue) from the Winisoft family (Protect Soldier, Protect Defender, Armor Defender, DefendAPc, REAnti, ...)
Iron Defender comes from fake online antivirus scanners or fake video codecs, creates random files on the system and detects them as infected. It also display a lot of disturbing warning messages to scare users.
If your PC is infected with Iron Defender, use MBAM to remove the infection.