What is WGA for Windows Vista?
WGA for Windows Vista is a set of anti-piracy technologies built into Windows Vista, as well as an overall approach to protecting the product from piracy. These technologies are designed to help Microsoft make software piracy harder and to help protect consumers and businesses from the risks of counterfeit software.
With Windows Vista, Windows Genuine Advantage is built in. WGA for Windows Vista is enabled by the Software Protection Platform (SPP), a new set of anti-piracy technologies to help Microsoft make software piracy harder and to help protect consumers and business against the risks of counterfeit software.