I’d recently put Windows 8 on a test machine at work and started installing what software I needed. Pretty quickly I found I needed to install .Net Framework 3.5 which is now a ‘Feature’ instead of a separate download.
Switching this on prompted me to download files from Windows Update.
That seemed to go OK for a while.
Unfortunately, after a few minutes, it failed.
Error code 0x800F0906 leads you to troubleshooting articles such as:
.NET Framework 3.5 installation error: 0x800F0906, 0x800F081F, 0x800F0907
http://support2.microsoft.com/kb/2734782
“This error code occurs because the computer cannot download the required files from Windows Update.”
- First suggestion is to check Windows Update is actually accessible. Start with the easy ones
- Getting a little bit trickier, second suggestion is to make sure there isn’t a Group Policy in place preventing the install process from contacting Windows Update.
- Then you get your hands dirty with DISM.EXE command line instructions.
Deployment Image Servicing and Management tool
Version: 6.2.9200.16384
Image Version: 6.2.9200.16384
Enabling feature(s)
[===========================65.9%====== ]
Error: 0x800f081f
The source files could not be found.
Use the "Source" option to specify the location of the files that are required t
o restore the feature. For more information on specifying a source location, see
http://go.microsoft.com/fwlink/?LinkId=243077.
The DISM log file can be found at C:\Windows\Logs\DISM\dism.logSo now I have a new error code – 0x800F081F – to muddy the water with.
Checking the DISM.LOG file
2014-09-29 14:07:15, Info
DISM DISM Package Manager: PID=2296 TID=1256 Error in operation: source for package or file not found, ResolveSource() unsuccessful. (CBS HRESULT=0x800f081f) - CCbsConUIHandler::Error
2014-09-29 14:07:15, Error
DISM DISM Package Manager: PID=2296 TID=4732 Failed finalizing changes. - CDISMPackageManager::Internal_Finalize(hr:0x800f081f)
2014-09-29 14:07:15, Error
DISM DISM Package Manager: PID=2296 TID=4732 The source files could not be found; their location must be specified using the /source option to restore the feature. – GetCbsErrorMsg
Not really helpful as it doesn’t explain what’s missing. Now I’m happy with my DISM command:
Dism /online /enable-feature /featurename:NetFx3 /All
/Source:C:\Drivers\Microsoft\Windows8\sources\sxs
/LimitAccessso it must be that the files are missing from the install files, which seems unlikely.
Looking for help on the new error code, I found:
Windows Update error 0x800F081F
http://windows.microsoft.com/en-gb/windows-8/windows-update-error-0x800f081f
The recommended DISM.EXE commands to clean up the Component Store made no difference:
dism.exe /online /cleanup-image /scanhealth
dism.exe /online /cleanup-image /restorehealthI then moved on to Joseph Conway’s Technet blog:
How to troubleshoot error 0x800F081F when installing roles and features
http://blogs.technet.com/b/joscon/archive/2012/11/30/how-to-troubleshoot-error-0x800f081f-when-installing-roles-and-features.aspx
- Download the ISO again – couldn’t complete this one easily. Could fill a blog just on how difficult it is to get access to install software at work…
- Clean up the Component Store – already tried
- Disable any access to WSUS – also already tried
- Update your source media – this sounded promising…
How to update local source media to add roles and features
http://blogs.technet.com/b/joscon/archive/2012/11/14/how-to-update-local-source-media-to-add-roles-and-features.aspx
Sadly, I couldn’t get this to work and gave up trying after a while.
Going back to basics, my next stop was CBS.LOG as that’s where the “Component-Based Servicing” work is recorded.
2014-09-29 14:18:47, Info
CBS Calling client to resolve source, cannot find file 'amd64_microsoft-windows-wpfcorecomp.resources_31bf3856ad364e35_6.2.9200.21161_en-us_0b79bec03324a82a\PresentationHostDLL.dll.mui'
2014-09-29 14:18:47, Info
CBS Exec: Not able to pre-stage package: Microsoft-Windows-IIS-WebServer-AddOn-Package~31bf3856ad364e35~amd64~en-US~6.2.9200.16384, file: PresentationHostDLL.dll.mui, source: \\?\C:\Windows\Servicing\Packages\amd64_microsoft-windows-wpfcorecomp.resources_31bf3856ad364e35_6.2.9200.21161_en-us_0b79bec03324a82a\PresentationHostDLL.dll.muiLooking in the \sources\sxs folder, I can only see sub-folders for
and so on but not for the missing folders.
Which is when I noticed that the folders have a build number of 6.2.9200.16384 but the missing folder has a build number of 6.2.9200.21161.
Searching online for the build number quickly found problems with a bunch of Windows Update fixes.
.NET Framework 3.5 0x800F0906 then 0x800f081f
http://answers.microsoft.com/en-us/windows/forum/windows8_1-windows_update/net-framework-35-0x800f0906-then-0x800f081f/cf62fb25-5ba1-4341-962e-881e7a2951a1
Just uninstall updates KB2966826 and KB2966828 and it will help you.
Looking in the list of installed updates, I found I had KB2966827 present:
MS14-046: Description of the security update for the .NET Framework 3.5 on Windows 8 and Windows Server 2012: August 12, 2014
http://support2.microsoft.com/kb/2966827
Now why do I have a .NET Framework 3.5 hotfix installed on a machine that hasn’t yet had .NET Framework 3.5 installed?!
The presence of the hotfix meant the installation was always expecting to find newer files than came with the Windows 8 source files.
As soon as I uninstalled the hotfix, I could add the .NET Framework 3.5 feature and start using my applications.
