history

n 2000, Microsoft started the planning to follow up Windows XP and its server counterpart Windows Server 2003 (both codenamed Whistler) with a major new release of Windows that was codenamed Blackcomb (both codenames refer to the Whistler-Blackcomb resort). This new version was at that time scheduled for a 2005 release.

Major features were planned for Blackcomb, including an emphasis on searching and querying data and an advanced storage system named WinFS to enable such scenarios. In this context, a feature mentioned by Bill Gates for Blackcomb was "a pervasive typing line that will recognize the sentence that [the user is] typing in."

Later Blackcomb was delayed and an interim minor release, codenamed "Longhorn", was announced for a 2003 release. By the middle of 2003, however, Longhorn had acquired some of the features originally intended for Blackcomb, including WinFS, the Desktop Window Manager, and new versions of system components built on the .NET Framework. After the 2003 "Summer of Worms", where three major viruses -- Blaster, Sobig, and Welchia -- exploited flaws in Windows operating systems within a short time period, Microsoft changed their development priorities, putting some of Longhorn's major development work on hold in order to develop new service packs for Windows XP and Windows Server 2003 that included a number of new security and safety features. Development of Longhorn was also "reset" in September 2004^{[citation needed]} as a result of concerns about the quality of code that was being introduced to the operating system. The eventual result of this was that WinFS, the Next Generation Secure Computing Base, and other features seen in Longhorn builds were deemed "not ready" for wide release, and as such did not appear in Longhorn, when it was released as Windows Vista and Windows Server 2008.

As major feature work on Windows Vista wound down in early 2006, Blackcomb was renamed Vienna. However, following the release of Windows Vista, it was confirmed by Microsoft on July 20, 2007 that "the internal name for the next version of the Windows Client OS" is Windows 7, a name that had been reported by some sources months before.

Windows 7 is the working name for the next major version of Microsoft Windows as the successor of Windows Vista. Microsoft has announced that it is "scoping Windows 7 development to a three-year timeframe", and that "the specific release date will ultimately be determined by meeting the quality bar." Windows 7 is expected to be released sometime in 2010. The client versions of Windows 7 will ship in both 32-bit and 64-bit versions. A server variant, codenamed Windows Server 7, is also under development.

Microsoft is maintaining a policy of silence concerning discussion of plans and aspirations for Windows 7 as they focus on the release and marketing of Windows Vista, though some early details of various core operating system features have emerged. As a result, little is known about the feature set, though public presentations from company officials have disseminated information about some features. Leaked information from people to whom Milestone 1 (M1) of Windows 7 was shipped also provides some insight into the feature set.