Thread: What is Windows Genuine Advantage?

Windows Genuine Advantage (WGA) is an initiative by Microsoft to prevent software piracy. When Windows is installed on a PC, a serial number must be entered that verifies that the software was bought legally. Only owners of genuine Windows have access to support and software updates from Microsoft.

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. 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.[1]
WGA also advertises the latest service pack for Windows XP, which requires manual intervention to disable. Previously voluntary, it became mandatory for use of these services. Despite its name it does not directly evaluate the integrity or security of any computer