The first preview was released to Insiders on August 11, 2016. Windows 10 Creators Update, (or Windows 10 Version 1703, codenamed ' Redstone 2', build 3), is the third major update to Windows 10 and the second of the 4 major updates planned under the Redstone codenames. The Redstone 1 release of Windows 10 is supported for users of the Current Branch (CB) and Long-Term Support Branch (LTSB) It was released to the public on August 2, 2016. The first preview was released on December 16, 2015. It carries the build number 3 and version 1607. Windows 10 Anniversary Update, or Windows 10 Version 1607 (build 3), codenamed ' Redstone 1', is the second major update to Windows 10 and the first of the 4 major updates planned under the Redstone codenames. The Threshold 2 release of Windows 10 is supported for users of the Current Branch for Business (CBB). 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 final release was made available to Windows Insiders on November 3, 2015, followed by a public release on Novemto existing Windows 10 users, and as a free upgrade from Windows 7 and Windows 8.1. The first preview was released on August 18, 2015. It carries the build number 6 and version 1511, referencing its date of release, November 2015.

Windows 10 November Update, or Windows 10 Version 1511 (build 6), codenamed ' Threshold 2', is the first major update to Windows 10. Support of version 1507 ended on May 9, 2017. As of August 2, 2016, the Threshold 1 release is the only available release in Long Term Servicing Branch (LTSB). The final release was made available to Windows Insiders on July 15, 2015, followed by a public release on July 29, 2015. It has been retroactively named 'version 1507' by Microsoft per its naming conventions for future stable releases of the operating system.

It carries the build number 0 while Microsoft has stated that there was no designated 'RTM' build of Windows 10, 10240 has been described as an RTM build by various media outlets. Windows 10 Version 1507 (build 0), codenamed ' Threshold 1', is the first release of Windows 10.

1.5 Version 1709 (Fall Creators Update).

Windows 10 pro operating system