Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online.Windows Aero is the graphical user interface and the default theme in most editions of Windows Vista and Windows 7 , operating systems released by Microsoft. It is also available in Windows Server 2008. Its name is a backronym for Authentic, Energetic, Reflective and Open. Intended to be a cleaner, more powerful, more efficient and more aesthetically pleasing user interface than the previously used theme (Luna), it includes new translucency, live thumbnails, live icons, animations and eye candy. Aero also encompasses a set of user interface design guidelines for Microsoft Windows.