Installing .Net Framework 3.5 SP1 on Windows 8 x64 fails and dism at 65.8% with error code 0x800f081f

I am using Windows 8 x64 and would like to install the .NET Framework 3.5. I've downloaded the full package dotnetfx35 from http://www.microsoft.com/en-us/download/details.aspx?id=25150. Installation fails with Error: 0x800f081f the source files could not be found.

Regression:

I've already read How to enable .NET Framework 3.5 on Windows 8 without downloading it?
dism.exe /online /enable-feature /featurename:NetFX3 /All /Source:f:\sources\sxs /LimitAccess fails at 65.8% with error code 0x800f081f
In my win8 iso file's sxs folder, there doesn't exist a .net x64

How can I install .NET Framework 3.5 on Windows 8?

Error: 0x800f081f the source files could not be found

Mohammad Dayyan

Posted 2013-03-24T20:37:38.740

Reputation: 1 543

Are you sure that the F drive is where iso is mounted? Double check in Explorer an make sure you're pointing the /Source option to the correct location. – Windos – 2013-03-24T20:44:00.003

yes, I'm dead sure about it – Mohammad Dayyan – 2013-03-24T20:45:13.873

2What iso are you using and where did you get it from? – Windos – 2013-03-24T21:21:47.227

If you can access Windows Update, you can install it through the Control Panel as described in http://msdn.microsoft.com/en-us/library/hh506443.aspx

– David Marshall – 2013-03-24T22:47:10.913

@DavidMarshall I don't agree with your statement that when you can access Windows Update, that .NET Framework 3.5 can be installed through the Control Panel. In our case the "Control Panel" method returns the 0x800f081f error code where the dism.exe /online /enable-feature /featurename:NetFX3 /All /Source:D:\sources\sxs /LimitAccess command and a newer 8.1 DVD does result in a successful installation of the .NET Framework 3.5. – Pro Backup – 2014-04-05T18:52:02.243

Answers

Download the Enterprise Evaluation ISO, mount it and now point to this ISO. This ISO includes the SxS folder.

magicandre1981

Posted 2013-03-24T20:37:38.740

Reputation: 86 560

And make sure that you don't make any typos in the dism.exe command. I for example mistyped a lower case x (/featurename:NetFx3) instead of the required upper case X (/featurename:NetFX3). – Pro Backup – 2014-04-05T18:46:47.450

Enable .Net Framework in Control Panel » Uninstall or Change Programs. Turn Windows Features and check the box Update Windows.

creapure90

Posted 2013-03-24T20:37:38.740

Reputation: 41

3Please familiarize yourself with the formatting options on this site, and use proper capitalization in your posts. Maybe you could expand your answer a little to explain in more detail why this solves the problem? Thank you. – slhck – 2013-03-24T21:44:42.367

Uninstall the security updates KB2966826 and KB2966828 and then install framework from the control panel/ program and features/ turn windows features on

dori4n

Posted 2013-03-24T20:37:38.740

Reputation: 11