'''Windows November 10 November Update''', or '''Windows 10 Version 1511''', codenamed "''Threshold 2''", is the first major update to Windows 10. It carries the build number 10.0.10586 and version 1511, referencing its date of release, November 2015. The first preview was released on August 18, 2015. The final release was made available to Windows Insiders on November 3, 2015, followed by a public release on November 12, 2015, to existing Windows 10 users, and as a free upgrade from Windows 7 and Windows 8.1. Unlike the initial release of Windows, this branch was also made available to existing [[Windows Phone 8.1]]-devices and the [[Xbox One]] and as a preview release to [[Windows Server 2016]], and was pre-installed on new [[Windows 10 Mobile]]-devices like the [[Microsoft Lumia 950]].
The Threshold 2 release of Windows 10 is supported for users of the Current Branch for Businesses (CBB)
