Windows 10 build 9860

Windows 10 build 9860 is the second officially released Technical Preview build of Windows 10. Its buildtag was initially found through the ThresholdInternal build update mechanism on 10 October 2014. It was later released to those who joined the Windows Insider Program on 21 October 2014 and was downloadable via the Preview Builds build update mechanism in build 9841.

Changes

 * Action Center, a Windows Phone-like notification area, has returned compared to build 9841.
 * Metro apps can now run in screen resolutions lower than 1024x768.
 * The themes got a slight change to fix the Metro effects.
 * Window animations have been updated.
 * Support for the Matroska Multimedia Container and the HEVC codec has been added.

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

Hidden login screen
A UWP login screen was added. To enable it, set  to 1 under   in the registry.

XAML start menu
This build has a XAML start menu that is disabled by default. It is very buggy and works only by keyboard navigation. To enable it, create and set  to 1 under.

Ability to disable windowed Metro applications
This is the latest build that has the ability to disable native support for Metro apps in windowed mode. To enable this, merge the following registry setting:

This is quite buggy, however in the next build it will result in all Metro applications crashing on launch.

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


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

Window thumbnail border color error
If window auto-colorization is enabled, the window thumbnail borders on the taskbar do not change color even after the wallpaper changes. This issue can be remedied by manually changing the window color through the Control Panel or restarting Windows.

Windows 9 reference
Starting with this build, a reference to the Windows 9 name can be found in.