Windows Mobile 7 or Photon - originally a successor of Windows Mobile, it had been scrapped for Windows Phone 7 with Metro UI. Windows Neptune (December 27, 1999) – the first planned version of Microsoft Windows NT to have a consumer edition variant, based on the Windows 2000 codebase. A version was sent out to testers but was never released.
Windows 7, a major release of the Microsoft Windows operating system, was available in six different editions: Starter, Home Basic, Home Premium, Professional, Enterprise and Ultimate.Only Home Premium, Professional, and Ultimate were widely available at retailers. The other editions focus on other markets, such as the software development world or enterprise use.
 More specific than a version number, at least in Windows, is a build number, often indicating exactly what major update or service pack has been applied to that Windows version. This is the last number shown in the version number column, like 7600 for Windows 7. Some sources note the build number in parenthesis, like 6.1 (7600).
What I mean by version number is not necessary mean the OS name or service packs. For example, Windows 7, doesn’t necessary mean it’s the 7th version of Windows coming from Microsoft. As we have discussed before on our opinion of Why Windows 7 is named Seven. Here is a list of versions of Windows, since Windows Operating System 1.0. The ...
Windows Starter 7 will not have the Aero Glass graphical user interface that is included in all other versions of Windows 7 (except Windows 7 Home Basic) and can only run three applications at a time.
Editions in details Main editions Windows 7 Starter Windows 7 Starter is the edition of Windows 7 that contains the fewest features. Windows 7 Starter is only available in a 32-bit version. The Windows Aero theme is sadly not included in this version. The desktop wallpaper and Visual Styles (Windows 7 Basic) are not user-changeable.
Windows 7 Professional, the middle class of the Windows versions, will run you approximately $299 for a full version, and $199 for an upgrade. As previously mentioned, Professional adds XP Mode, Domain Join, and network backup upgrades from Home Basic.
 Beginning in Windows 8, Microsoft began releasing regular, major updates to Windows 8. Service packs will not be released.  Windows 7 SP1 and the April 2015 Servicing Stack Update both must be installed prior to installing the Convenience Rollup.  Windows Vista SP2 can only be installed if you already have Windows Vista SP1 installed, which you can download here for 32-bit versions ...
A list with version and build numbers of Microsoft Windows.
The server counterpart of Windows 7, which is Windows Server 2008 R2 was also released approximately around the same time. The successor of Windows 7 will be Windows 8, to be launched in the near future. Along with new features, Windows 7 comes in many versions, customized for different user profiles.