.Net Framework 3.5 fails to install with error code 0x800F081F

Anonymous

Original Title: Error installing .net framework 3.5 sp1

I did a refresh of my install of windows 8 pro (64 bit), because Weather and several other apps were failing (they started, then the main window closed, but the small window stayed in the task list to the left; event viewer gave access permissions errors).

This seemed to sort most of the apps BUT now I cannot re-install many programs as they need .net framework 3.5 and this fails to install with error 0x800F081F. I even tried downloading the full installer and running locally but it still gives the same error!

I need the framework to work with OpenXML development, a large part of my work.

(I should also point out the refresh says most apps are retained - it fails to mention all applications are removed!)

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Anonymous

Hi Andy,

Thank you for posting your query in Microsoft Community and giving us an opportunity to assist you.

From the issue description, you are facing issues with installing .Net Framework 3.5 and receiving error code 0x800F081F.

There is a Microsoft Knowledge Base article that provides methods to troubleshoot this issue. I would suggest that you visit the link and use the methods to resolve the issue.

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

http://support.microsoft.com/kb/2734782

You may also refer this link for more information:

Installing the .NET Framework 3.5 on Windows 8

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

Hope this information helps. Let us know if you need any further assistance related to Windows.

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80 additional answers

Anonymous

2015-09-19T16:20:55+00:00
None of the solutions presented worked for me, however, after digging around in the registry I found the following:

DisableWindowsUpdateAccess (Binary - 1) at HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate

So, try the following:
1. Delete the key: HKLM\Software\Policies\Microsoft\Windows\WindowsUpdate
2. Open CMD as administrator
3. net stop wuauserv
4. net start wuauserv
5. Download and install this: https://www.microsoft.com/en-gb/download/details.aspx?id=21
This seemed to do the trick for me.

Hope this helps a few others!
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Anonymous

2015-01-17T23:49:32+00:00

I had the same issue.

The solution in this video worked for me:

https://www.youtube.com/watch?v=pO3gb5JA7cQ
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Anonymous

2014-10-03T05:34:53+00:00

Just uninstall updates KB2966826 and KB2966828 and it will help you. See: geekswithblogs.net/Plumbersmate/archive/2014/09/29/windows-8ndashcanrsquot-install-.net-framework-3.5-0x800f0906-0x800f081f.aspx
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Anonymous

2014-09-23T15:32:47+00:00

I have a Lenovo Y410 7757 laptop which is still a very good machine, but was an absolute pain to get all the way up to windows 8.1 and working properly. My problem happened after having my ISP crash in the middle of the latest windows 8.1 update. This gave me a black screen so I had to rollback to vista, then 8, then 8.1 again and realized I didn't make sure that net 3.5 was there before installing 8. So I had to do it all again after downloading net 3.5 separately first on vista before proceeding with the clean install of 8, then 8.1....then the unchecked box was there to use. I needed it for zune and some older post script items in my office.
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