Windows 7 worked on Windows 7. These were broadly divided into "core operating system" and "Windows client experience", in turn organized into 25 teams of around 40 developers on average. In October 2008, it was announced that Windows 7 would also be the official name of the operating system. There has been some confusion over naming the product Windows 7, while versioning it as 6.1 to indicate its similar build to Vista and increase compatibility with applications that only check major version numbers, similar to Windows 2000 and Windows XP both having 5.x version numbers. The first external release to select Microsoft
Development of Windows Vista the longhorn codename in a prominent manner. Microsoft started work on Service Pack 2 soon after Service Pack 1 was released, as Windows Server 2008 uses the same codebase as Windows Vista Service Pack 1. Service Pack 2 is the first service pack to be released for both Windows Server 2008 and Windows Vista simultaneously, sharing the same binary. Windows Vista Service Pack 2 Pre-Beta Build Number 6002.16489.lh_sp2beta.080924-1740 (Version 105) Released in October 2008. Windows Vista Service Pack 2 Beta Build Number 6002.16497.081017-1605 (Version 113) Released December 4, 2008. Download became available in the Microsoft Download Center. Windows Vista Service