Windows 8.1 unable to install .NET Framework 3.5 0*800F0906

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After trying to install .net 3.5 via the program and features (see below). I was getting unable to install error 800F0906

I am using windows 8.1.

windows features

Barnabas answered 7/8, 2014 at 17:3 Comment(0)

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I inserted windows 8.1 dvd and mounted to d drive then executed from powershell.

Open admin command prompt
Type powershell
From ps prompt type

Enable-WindowsOptionalFeature -Online -FeatureName 'NetFx3' -Source 'd:\sources\sxs'

It did take 5 minutes to run.

Barnabas answered 7/8, 2014 at 17:3 Comment(4)

Has anyone had an experience where this worked and the cmd solution didn't? Also they should put this on the MS website & other forums, even if it's identical to the cmd solution (which I don't know if it is). – Bema 26/8, 2014 at 13:16

@Bema I just experienced this. No other way would work: Online/Offline installers, the dism command. Finally using the powershell variant worked. – Translator 30/1, 2015 at 23:28

It does not work. Microsoft SSUUCCKKSS. Why is Framework 3.5 not installed by DEFAULT on ALL Windows versions ??? FF UU CC KK – Antacid 7/7, 2015 at 3:39

We developers can find a way to do it but the problem is when we ship applications that need .Net framework 3.5 and the end user installs it on windows 8.1.. so weird from microsoft – Preferable 6/12, 2015 at 0:57

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See http://yellowduckguy.wordpress.com/2012/10/19/windows-8-fix-enable-feature-net-3-5-error-0x800f0906/ for a detailed description.

Enter in cmd (run with administratoir rights): dism /online /Enable-Feature /FeatureName:NetFX3 /All /Source:E:\Sources\SxS /LimitAccess (e: is your DVD drive)

Hanukkah answered 7/8, 2014 at 17:5 Comment(0)

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You probably have a GPO that blocks updates directly from Microsoft. Did not check the WSUS server to see if the required packages were present. Simply made these registry changes and the PC was able to pull down the updates. Note, no need to undo these as the GPO will do it for you.

----- Below this line is the actual content to create your own .REG file -----

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Policies\WindowsUpdate]
"DisableWindowsUpdateAccess"=dword:00000000
"DisableWindowsUpdateAccessMode"=dword:00000000

Unvarnished answered 10/8, 2015 at 16:3 Comment(2)

I can confirm there are no policies defined in my case yet I get 0x800F0906 error when installing .Net 3.5 framework. Its a clean install of windows 8.1 pro 64 bit – Preferable 6/12, 2015 at 0:51

What does GPO stands for? – Citric 8/5, 2017 at 1:32

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Found link that identifies two Windows Updates as the problem if DISM and the offline installer do not work. Uninstall KB2966826 and KB2966828, then try installing 3.5 from programs and features. It worked for me.

By Chris Wardario

Bumbling answered 8/9, 2014 at 16:30 Comment(2)

You copied that link. But you did not try it. This problem has nothing to do with a KB. It even happens on a completely fresh Windows without any KB being installed. – Antacid 7/7, 2015 at 4:18

I have just installed a clean windows 8.1 pro 64 bit. there are no updates whatsoever and yet I get the same error. This appears to be a problem on the update server of MS – Preferable 6/12, 2015 at 0:54

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I had to log in as a local admin account, rather than runas to get it to download the missing binaries.

Body answered 16/3, 2015 at 22:28 Comment(0)

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I temporarily set User Account Control (UAC) to Never notify.

Start -> Control Panel
Search for uac and select Change User Account Control settings

http://windows.microsoft.com/en-us/windows/turn-user-account-control-on-off#1TC=windows-7

Steib answered 25/5, 2015 at 18:16 Comment(0)

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I ran into this issue today and it ended up being a problem with the WSUS server not having the necessary updates synced. To test this, I removed the PC from the policy that points the the WSUS server and adding the feature through the control panel is now working. I don't know if this will apply to everyone but I figured I would add my two cents.

Apostate answered 3/6, 2015 at 14:12 Comment(0)

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I was facing same issue.

Cause: under gpeditor, MS update service location was set to some local WSUS.

Solution: copy that URL and set MS update service location disable or Not configured from gpeditor. now try steps from feature on/off Windows to install .Net Framework 3.5. after successfully completion revert WSUS update service URL.

[for MS update service location: under Run=> gpedit.msc navigate to Comp Conf->Admin Templates->Win Components->Win Update->"Specify internet MS update service location" ]

if MS update service location is not configured then check internet connection otherwise it's some other related issue.

Erst answered 21/1, 2016 at 13:53 Comment(0)

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Microsoft has some changes...

Try the full pack Microsoft .NET Framework 3.5 Service pack 1 (Full Package)

Dwarf answered 6/4, 2019 at 13:53 Comment(0)

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check your windows firewall. That must be turned on.

Nickelson answered 30/8, 2016 at 8:53 Comment(0)

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