dism Microsoft .NET Framework 3.5 error halt at 66%

When install the Microsoft .NET Framework 3.5 on a computer that is running Windows 10, Windows 8.1, Windows Server 2012 R2, Windows 8 or Windows Server 2012. Error codes 0x800F0906, 0x800F081F, 0x800F0907 popup. And the instaltion stop around 66% .

First try this simple solution : copy the folder C:\Windows\WinSxS from server that have the installation already to some local folder like d:\tmp (for this example) then run powershell as administrator and type :

ps c:\Install-WindowsFeature -name NET-Framework-Core -source d:\tmp\WinSxS

If that don’t help try this steps from microsoft support : https://support.microsoft.com/en-us/kb/2734782

  1. check if you are connected to the internet
  2. allow group policy repair for optional componnents :
  3. group policy.
    Start Group Policy in Windows 8Windows 8.1 and Windows Server 2012 R2: Point to the upper-right corner of the screen, click Search, type group policy, and then click Edit group policy.
    Open group policy in Windows 8.1
  4. Expand Computer Configuration, expand Administrative Templates, and then select System. The screen shot for this step is listed below.
    The screen shot for this step
  5. Open the Specify settings for optional component installation and component repair Group Policy setting, and then select Enabled. The screen shot for this step is listed below.
    The screen shot for this step
  6. If you want to specify an alternative source file, in the Alternate source file path box, specify a fully qualified path of a shared folder that contains the contents of the \sources\sxs folder from the installation media.
    Example of a shared folder path: \\server_name\share\Win8sxs

    Or, specify a WIM file. To specify a WIM file as an alternative source file location, add the prefix WIM: to the path, and then add the index of the image that you want to use in the WIM file as a suffix.

    Example of a WIM file path: WIM:\\server_name\share\install.wim:3
    Note In this example, 3 represents the index of the image in which the feature files are found.
  7. If it is applicable to do this, select the Contact Windows Update directly to download repair content instead of Windows Server Update Services (WSUS) check box.
  8. Tap or click OK.
  9. At an elevated command prompt, type the following command, and then press Enter to apply the policy immediately:
    gpupdate /force

Method 3: Use Windows installation media

You can use the Windows installation media as the file source when you enable the .NET Framework 3.5 feature. To do this, follow these steps:

  1. Insert the Windows installation media.
  2. At an elevated command prompt, run the following command:
    Dism /online /enable-feature /featurename:NetFx3 /All /Source:<drive>:\sources\sxs /LimitAccess

    Note In this command, <drive> is a placeholder for the drive letter for the DVD drive or for the Windows 8 installation media. For example, you run the following command:

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

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