Windows 10 build 9906

10.0.9906.0.winmain_prs.141209-1616
Build of Windows 10
Screenshot
OS familyWindows NT
Version number10.0
Build number9906
Build revision0
Architecturex86, x64
Build labwinmain_prs
Compiled on2014-12-09
Expiration date
Timebomb2015-04-15 (+127 days)
About dialog
Windows10-10.0.9906-About.png
TCB.png TCBGallery.png

Windows 10 build 9906 is a build of Windows 10, which was shared by BetaArchive user gus33000 on 29 January 2015.[1]

Editions and keys[edit | edit source]

Edition / SKU Name Key
Professional NKJFK-GPHP7-G8C3J-P6JXR-HQRJR
ProfessionalWMC (edition upgrade only) GBFNG-2X3TC-8R27F-RMKYB-JK7QT
Enterprise PBHCJ-Q2NYD-2PX34-T2TD6-233PK

New feature and changes[edit | edit source]

Apps[edit | edit source]

  • Photos has been updated with a redesigned UI.
  • Contact Support received a new icon.
  • Camera has been taken out of beta.

Settings[edit | edit source]

  • An option to scroll inactive windows when hovered over has been added.
  • Several page names have been adjusted.

Findings[edit | edit source]

Hidden features[edit | edit source]

The following hidden features have been found within this build:

  • New tray clock user interface - enabled by creating key UseWin32TrayClockExperience under [HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\ImmersiveShell]
  • Hidden lock screen - enabled by setting Threshold to 1 under [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication\LogonUI\TestHooks]
  • Enable XAML Start menu - create and set UseExperience to 1 under [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\ImmersiveShell\Launcher]
  • New volume flyout - enable by setting EnableMtcUvc to 1 under [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\MTCUVC]

Bugs[edit | edit source]

BIOS support[edit | edit source]

This build will only work on real hardware utilizing BIOS, unlike VMware which gives a CPU fault. On VMware, the user will need to use UEFI firmware.

Window thumbnail border color error[edit | edit source]

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.

Gallery[edit | edit source]

References[edit | edit source]