During XP's development, Microsoft cycled through several prototype logos to determine the identity of Windows XP. This logo was the most used in prototypes—usually in concept designs of the physical box—but was never actually used in any build of XP. In 2009, several prototype wallpapers were created for Microsoft's then-new operating system, Windows 7. 4 concepts were discovered so far, all of them containing the Windows logo, with the last one resembling the final version a lot more…