http://blogs.msdn.com/mscantraining/archive/2009/07/02/9814314.aspxWindows product activation, which was first introduced in consumer editions, is now required for all editions of the Windows operating system. In this webcast, we provide a business and technical overview of the activation and validation changes in Windowsen-USCommunityServer 2.1 SP1 (Build: 61025.2)