Microsoft always tries hard to prevent piracy but somehow hackers release fixes and tools to check Microsoft from detecting pirated copies by using technologies like Windows Activation Technologies (WAT) for Windows 7 and Windows Genuine Advantage for Windows XP, a screenshot posted by Beta tester @sp3ciali5t on TwitPic  on Genuine Center in Windows 8 reveals following details.

Windows 8 Genuine Center

Windows 8 Genuine Center screenshot

Screenshot shows action status of OS, the current edition, activation date, whether the running copy of Windows is genuine or not.

Source : Neowin