Windows 10 build 9926

Windows 10 build 9926 is the fourth officially released Technical Preview build of Windows 10, which was released to Windows Insiders in all rings on 23 January 2015.

This is the first and the only publicly available build to be compiled in the  branch, a replacement for the   branch. All following publicly available builds would be compiled in the  branch, which was confirmed by Gabe Aul, as of 2 November 2015.

New features and changes

 * First indications of final edition names have been included.
 * Several apps, including PC Settings, Voice Recorder, Alarms and Xbox received major updates.
 * Most of the features showcased in the 21 January 2015 event such as Cortana, Office Touch and Continuum are included.

Hidden features
The following hidden features have been found within build 9926:


 * New tray clock user interface - enabled by creating key  under
 * Hidden lock screen - enabled by setting  to 1 under   in the registry.
 * Return to the old Start menu - set  to 0 under
 * New volume flyout - enable by setting  to 1 under

Hidden apps
There are a few hidden apps in this build:


 * Windows Default Lock Screen - accessed by running
 * Cloud Experience Host - accessed by running
 * Print Dialog - accessed by running
 * Windows Shell Experience Host - accessed by running

Missing features
This build has several missing features:


 * Project Spartan
 * Streaming feature in Xbox app
 * Mail and Calendar apps
 * Several missing features in Cortana, such as sending mails.
 * Jump Lists
 * Transparency in the XAML Start Menu (from the 21 January 2015 event)

Most of these features are confirmed to return in future builds.