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

Question

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?

Solution 1

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

Solution 2

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

Comments

[Windos]

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.

[user1717803]

yes, I'm dead sure about it

[Windos]

What iso are you using and where did you get it from?

[David Marshall]

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

[Pro Backup]

@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.

[slhck]

Please 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.

[Pro Backup]

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).