High Quality Content by WIKIPEDIA articles! Windows Genuine Advantage (WGA) is an anti-piracy system created by Microsoft that enforces online validation of the licensing of several recent Microsoft Windows operating systems when accessing several services, such as Windows Update, and downloading Windows components from the Microsoft Download Center. In Windows 7, WGA is renamed Windows Activation Technology. WGA consists of two components: an installable component called WGA Notifications that hooks into Winlogon and validates the Windows license upon each logon and an ActiveX control that checks the validity of the Windows license when downloading certain updates from the Microsoft Download Center or Windows Update. WGA Notifications covers Windows XP, Windows Vista and current versions of Windows 7. It does not cover other versions of the Windows NT family, such as Windows 2000, Windows Server 2003 and Windows XP Professional x64 Edition, or the Windows 9x family. The ActiveX control however checks Windows 2000 Professional licenses as well.