I have been struggling trying to install .Net 3.5 SP1 on my Windows 8 Pro PC.

I tried adding the feature through the windows feature add on window and that fails... I downloaded the .Net35 ex and ran that as admin.. that failed.

I have followed your detailed instructions on using DISM command both with the installation CD, and copying the files over to my E:\ drive... I get the same error

Description: Update NetFx3 of Package Microsoft .NET Framework 3.0 failed to be turned on. Status: 0x800f0906.

Please can you advise what options are open to me, as there are several programs/hardware components that won't work without it.

Thanks.

Terry

Try this:

Error codes when you try to install the .NET Framework 3.5 in Windows 8 or in Windows Server 2012

https://support.microsoft.com/kb/2734782/en-us

Installing the .NET Framework 3.5 on Windows 8

http://msdn.microsoft.com/en-us/library/hh506443.aspx

If it doesn't help you, zip and upload the Folder C:\Windows\Logs\CBS

I followed your instructions (3rd time I did this from previous suggestion posts)..

When using the recommended command (as administrator in Command.exe)

Dism /online /enable-feature /featurename:NetFx3 /All /Source:<var>D</var>:\sources\sxs /LimitAccess

I get Error: 0x899f0922

Where do I post the log file you are looking for?

Thanks.

Terry

Read other posts and found out how to upload the files, but it won't let me post them as a link so I took out https..

:-(

xxxx://skydrive.live.com/redir?resid=3F386C2A0DF86080!756&authkey=!AB9G_6upgiMLgb8

Thanks.

Terry

This is the command line that should work. (suggesting that D: is the location of the Windows 8 installation  files)

DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs

Nope... tried that and got the same error message:

C:\WINDOWS\system32>DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /Limit
Access /Source:D:\sources\sxs

Deployment Image Servicing and Management tool
Version: 6.2.9200.16384

Image Version: 6.2.9200.16384

Enabling feature(s)
[==========================100.0%==========================]

Error: 0x800f0922

DISM failed. No operation was performed.
For more information, review the log file.

The DISM log file can be found at C:\WINDOWS\Logs\DISM\dism.log

[gle=0x80004005]
2013-07-11 09:33:57, Error                 CSI    0000001a@2013/7/11:14:33:57.433 (F) Logged @2013/7/11:14:33:57.418 : [ml:322{161},l:320{160}]"Extract actual INI path "C:\WINDOWS\inf\SMSvcHost 3.0.0.0\_SMSvcHostPerfCounters.ini" from "C:\WINDOWS\inf\SMSvcHost 3.0.0.0\0000\_SMSvcHostPerfCounters_D.ini"."
[gle=0x80004005]
2013-07-11 09:33:57, Error                 CSI    0000001b@2013/7/11:14:33:57.433 (F) Logged @2013/7/11:14:33:57.418 : [ml:322{161},l:320{160}]"Extract actual INI path "C:\WINDOWS\inf\SMSvcHost 3.0.0.0\_SMSvcHostPerfCounters.ini" from "C:\WINDOWS\inf\SMSvcHost 3.0.0.0\0000\_SMSvcHostPerfCounters_D.ini"."
[gle=0x80004005]
2013-07-11 09:33:57, Error                 CSI    0000001c@2013/7/11:14:33:57.433 (F) Logged @2013/7/11:14:33:57.418 : [ml:322{161},l:320{160}]"Extract actual INI path "C:\WINDOWS\inf\SMSvcHost 3.0.0.0\_SMSvcHostPerfCounters.ini" from "C:\WINDOWS\inf\SMSvcHost 3.0.0.0\0000\_SMSvcHostPerfCounters_D.ini"."
[gle=0x80004005]
2013-07-11 09:33:57, Error                 CSI    0000001d@2013/7/11:14:33:57.433 (F) CMIADAPTER: Inner Error Message from AI HRESULT = HRESULT_FROM_WIN32(1010)
 [
[44]"The configuration registry key is invalid.

"
]
[gle=0x80004005]
2013-07-11 09:33:57, Error                 CSI    0000001e@2013/7/11:14:33:57.433 (F) CMIADAPTER: AI failed. HRESULT = HRESULT_FROM_WIN32(1010)
	Element:
	[51]"<lodctr xmlns="urn:schemas-microsoft-com:asm.v3" />"
[gle=0x80004005]
2013-07-11 09:33:57, Error                 CSI    0000001f@2013/7/11:14:33:57.433 (F) CMIADAPTER: Exiting with HRESULT code = HRESULT_FROM_WIN32(1010).
[gle=0x80004005]
2013-07-11 09:33:57, Info                  CSI    00000086 Performing 1 operations; 1 are not lock/unlock and follow:
  (0)  LockComponentPath (10): flags: 0 comp: {l:16 b:27ab37ad437ece01020200003003880b} pathid: {l:16 b:27ab37ad437ece01030200003003880b} path: [l:234{117}]"\SystemRoot\WinSxS\x86_microsoft.windows.s..ation.badcomponents_31bf3856ad364e35_6.2.9200.16384_none_353ccb4c94858655" pid: 330 starttime: 130180267691675895 (0x01ce7e43848710f7)
2013-07-11 09:33:57, Error      [0x018015] CSI    00000087 (F) Failed execution of queue item Installer: LodCtr Installer ({d82eedee-854e-4f9a-b458-ae1bc62a0e6b}) with HRESULT HRESULT_FROM_WIN32(1010).  Failure will not be ignored: A rollback will be initiated after all the operations in the installer queue are completed; installer is reliable (2)[gle=0x80004005]
2013-07-11 09:33:57, Info                  CBS    Added C:\WINDOWS\Logs\CBS\CBS.log to WER report.

Try this:

The issue was finally resolved after recreating the Perfmon counters registry keys using "lodctr /r". In fact, the "The configuration registry key is invalid" cryptic message mainly means that Perfmon registry keys are "corrupted" and need to be rebuilt. There are similar problems & resolutions on the web : http://social.msdn.microsoft.com/forums/en-US/winformssetup/thread/09a26089-6849-4dd6-a590-714a49dda609/). Note that before rebuilding the performance counters, it is recommended to backup current Perfmon counters registry keys using lodctr /s:"perfbkp.txt". After rebuilding the counters, the IIS role could be installed without any problem.

http://blogs.msdn.com/b/friis/archive/2012/01/04/unable-to-install-iis-web-server-role-the-configuration-registry-key-is-invalid.aspx