Windows System Suite is a fake system security tool that pretends to be a legit Windows security application. Its is a successor of such notorious false anti-spyware programs as Windows Security Suite, Malware Destructor 2009, Fast Antivirus, Malware Catcher, Virus Shield, Extra Antivirus, Virus Sweeper, Ultra Antivirus, Virus Doctor, VirusMelt and Virus Alarm. Windows System Suite is in most cases installed with the help of corrupt websites and trojans without any notice to the user.

Source: http://www.spywared.com/spyware-removal-instructions/2009/08/03/remove-windows-system-suite-windows-system-suite-removal-guide.html