Windows 10 build 9860

Windows 10 build 9860 is the second officially released Technical Preview build of the original release of Windows 10. The main addition in this build is a new Windows Phone-style notification area, now known as the Action Center. It also introduced support for the Matroska Multimedia Container and for the HEVC codec. Otherwise, it is quite similar to 9841.

The buildtag was initially found through the ThresholdInternal build update mechanism on 10 October 2014. The build was released to those signed up to the Windows Insider Program on 21 October 2014 and was downloadable via the Preview Builds build update mechanism in 9841.

Starting with this build, Metro apps can run in screen resolutions lower than 1024x768.

Window thumbnail color error
Window thumbnails on the taskbar do not change color, but the user can change it after the computer restarts.