BetaWiki:Featured article/2019-02

Windows 8.1 build 9431 is the official Preview build of Windows 8.1, also known as the Milestone Preview. This build was released on 2013-06-26 with the occasion of the Build 2013 conference taking place. At the time of its release, it was possible to upgrade to this build from a Windows 8 copy by using the Windows Store or by downloading an ISO from TechNet or MSDN. The ISOs were made publicly available the day after, on 2013-06-27, when the day 2 keynote started.

This build was initially released in 13 languages, which included Arabic, English (US), Chinese (Simplified), Chinese (Traditional), French, German, Japanese, Korean, Portuguese (Brazil), Russian, Spanish, Swedish, and Turkish. However, two weeks later, on 2013-07-04, Microsoft also released the English (UK) variant as a response to complaints. An RT version was also released, however, the only way to install this build on such a machine was through the Windows Store. This was also the only way to obtain less common SKUs such as Single Language.