Windows 8.1 build 9431

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6.3.9431.0.winmain_bluemp.130615-1214
Build of Windows 8.1
6.3.9431.0.winmain_bluemp.130615-1214
OS family
Architecturex86, x64, ARM
Compiled2013-06-15
Timebomb2014-01-15 (+214 days)
Works in
About
9431ClientWinver.png
TCB.png TCBGallery.png BA.png
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Embedded: TCB.png TCBGallery.png
RT: TCB.png TCBGallery.png
Single Language: TCBGallery.png

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 June 26, 2013 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 June 27, 2013 in multiple languages, when the day 2 keynote started. An ARM version of the build was also available, but it was only obtainable through the Microsoft Store. OOBE in this build is also the same as the RTM.

Editions and keys[edit | edit source]

Edition / SKU Name Key
Core 2H7NK-3VJJY-HHY3Y-WM3T8-JFCRY
CoreSingleLanguage JNMH9-BGBF6-RM6JP-DCRKM-2PJ6D
Professional NTTX3-RV7VB-T7X7F-WQYYY-9Y92F
ProfessionalWMC MBFBV-W3DP2-2MVKN-PJCQD-KKTF7
Enterprise YNB3T-VHW8P-72P6K-BQHCB-DM92V
EmbeddedIndustry H3WNG-GXTPH-3G4HP-8CXCJ-82M37

Findings, fixes, enhancements[edit | edit source]

User interface[edit | edit source]

This is the first build to bring back the visible Start button after being absent since Windows 8 build 8186.

SkyDrive[edit | edit source]

This build's SkyDrive client has several notable registry entries. Apart from the previous SkyDrivePagesTest value (which work in all avaliable builds), eight other registry values exist in this build. This makes the complete list look like this:

Rebranded SkyDrive

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\SkyDrivePagesTest\CameraRollDisabled
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\SkyDrivePagesTest\DisabledState
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\SkyDrivePagesTest\IsDomainAiccount
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\SkyDrivePagesTest\SkyDriveTest
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\SkyDrivePagesTest\MSAInterruptState
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\SkyDrivePagesTest\TotalSize
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\SkyDrivePagesTest\DisabledState
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\SkyDrivePagesTest\OtherSize
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\SkyDrivePagesTest\BackupSize
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\SkyDrivePagesTest\FileSize
HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\SkyDrivePagesTest\ErrorState

This version also includes a HKCU\Software\Microsoft\Windows\CurrentVersion\SkyDriveOptIn key with two values: Brand & OptIn choice, implying that there were plans for a SkyDrive subscription service at the time of this build. Setting Brand to 1 will cause the SkyDrive app to rebrand itself as Microsoft Drive, which showed the possibility of a name change (a result of the then recent BSkyB vs SkyDrive suit; the new name produced from the suit ended up being OneDrive).

Legacy F12 tools[edit | edit source]

Old and new F12 tools side-by-side

If you want to get the old F12 tools back, just create/change these two DWORD's in the registry to 1:

HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\EnableLegacyF12
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Main\FlipF12Shortcut

Media Center[edit | edit source]

You can get Media Center in this build. To get it, just copy this key: MBFBV-W3DP2-2MVKN-PJCQD-KKTF7 (from Windows 8 Release Preview) to the Add features dialog.

Photosynth[edit | edit source]

As in build 9385, it's possible to enable PhotoSynth mode in the camera app, which is disabled by default. Just follow these simple steps:

1. Download http://www.thecollectionbook.info/downloads/Win81639385CameraSettings.zip
2. Go to %localappdata%\Packages\Microsoft.MoCamera_cw5n1h2txyewy\Settings.
3. Replace the settings.dat with the downloaded one (backup if wanted).
4. Now when you launch the camera app, there should be a globe icon on the right, which activates the PhotoSynth mode.

Gallery[edit | edit source]