Windows Vista of January 2009, it had been announced that Vista usage had surpassed Microsoft's pre-launch two-year-out expectations of achieving 200 million users. At the release of Windows 7 (October 2009), Windows Vista (with approximately 400 million Internet users) was the second most widely used operating system on the Internet with an approximately 19% market share, the most widely used being Windows XP with an approximately 63% market share. In May 2010, Windows Vista's market share had an estimated range from 15% to 26%. On October 22, 2010, Microsoft ceased sales of retail copies of Windows Vista, and the OEM sales for
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