Tag Archives: December 2013 RU

A fix for when Windows 8.1 (RT) and Server 2012 R2 December 2013 update rollup (KB2903939) fails to install


On 12th December 2013, Microsoft released Windows RT 8.1, Windows 8.1, and Windows Server 2012 R2 update rollup: December 2013 – KB2903939 which will be offered to most folk via Windows Update.

There are reports that this update is failing with neither the Windows Update troubleshooter or the alternative DISM.exe /online /cleanup-image /restore health e.t.c. (that the troubleshooter suggests as an alternate approach) fixing the problem.

All the usual caveats apply – so don’t sue me … but if you are similarly affected, try this:

1. Download KB2903939 as a standalone from here: http://www.microsoft.com/en-us/download/details.aspx?id=41294 (if you have a 32bit – X86 install, you need this instead)

2. Actually download BOTH the subsequently offered Windows8.1-KB2903939-x64.msu AND Windows8.1-KB2911134-x64.msu

3. Run Windows8.1-KB2911134-x64.msu – (but NOT Windows8.1-KB2903939-x64.msu)

4. Spin up Powershell (type “Powershell” in an admin DOS cmd prompt).

5. In the Powershell prompt, run each of these commands:

set-service trustedinstaller -startuptype Disabled

reg load HKLM\COMPONENTS $env:windir\system32\config\COMPONENTS

Remove-Item -Path HKLM:\Components\DerivedData\VersionedIndex\* -Recurse


set-service trustedinstaller -startuptype Automatic

6. Run Windows8.1-KB2903939-x64.msu (that you downloaded in step 2)

7. Restart – when prompted.