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0x800F0906 error when installing .NET 3.5 on windows8. Solution

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  Cause Analysis:

In Windows 8 and Windows Server 2012 .Net Framework 3.5 is an on-demand distribution function. Metadata based on features is included in Windows 8 and Windows Server 2012. However binary files and other files associated with the function are not included. When this feature is enabled Windows will try to download the missing information to install Windows updates for this feature and errors may occur.

The network configuration and the computer's installation of updates in this configuration environment may affect this process. Therefore you may encounter errors when installing this feature for the first time.

  Solution:

This error code appears because the computer cannot download the required files from Windows Update.

through the network proxy server or firewall configuration or through the network proxy server or firewall failure will cause this phenomenon.

This phenomenon can also be caused by system administrators who configure the computer to use Windows Server Update Services (WSUS) instead of Microsoft Windows Update Server to provide services. In this case please contact the system administrator and ask them to enable the installation and repair of optional components. Specify the settings of the group policy settings and configure the alternate source file path value or choose to download the repair content directly with Windows Update instead of the Windows server Update Service (WSUS) option.

  To configure the group policy settings please perform the following steps:

1. Start the local group policy editor or the group policy management console enter gpedit.msc-OK.

  2. Expand Computer Configuration expand Administrative Templates and then select System.

  3. Open the installation and repair components of optional components to specify the group policy settings and then select Enable.

  4. If you want to specify the source file in the Alternate File Path box alternatively specify the fully qualified path of the shared folder containing the content from the sourcessxs folder of the installation media. Or specify a WIM file. To specify a WIM file as an alternate source file location add the path with the prefix WIM: and then add the index of the image you want to use as a suffix in the WIM file. The following is an example of the values ??you can specify:

  a. The path of the shared folder: \\server_nameshareWin8sxs

  b. WIM file which path in 3 represents the index of the image Find the feature file: WIM: \\server_nameshareinstall.wim:3

  5. If applicable to perform this operation please select the Windows Update contact to download the repair content directly instead of Windows Server Update Service (WSUS ) Check box.

  6. Please click or click Ok.

  7. At an elevated command prompt type the gpupdate /force command and then press Enter to apply the policy immediately:

Alternatively you can use the Windows installation media as the file source The features of .NET Framework 3.5 are enabled. Please follow the steps below:

1. Insert the Windows 8 or Windows Server 2012 installation media.

  2. At an elevated command prompt run the following command:

  Dism /Online /enable-feature /featurename:NetFx3 /All /Source:: sourcessxs /LimitAccess

p>

Note that in this command is a placeholder for the DVD drive or the drive letter of the Windows 8 installation medium. For example you can run the following command:

  Dism /online /enable-feature /featurename:NetFx3/All/Source:D:sourcessxs /LimitAccess

  Steps for Windows Server 2012< /p>

In Windows Server 2012 you can also specify an alternate source by using Windows PowerShell cmdlts or by using the Add Roles and Features Wizard.

To use Windows PowerShell follow these steps:

1. Insert the Windows Server 2012 installation media.

  2. In the elevated Windows PowerShell command window run the following command:

  Set WindowsFeature \u0026ndash; NET Framework core name \u0026ndash;source: sourcessxs

  Note In this command is a placeholder for the DVD drive or the drive letter of the Windows Server 2012 installation media. For example you can run the following command:

  Install-WindowsFeature \u0026ndash;name NET-Framework-Core \u0026ndash;source D:sourcessxs

To use the Add Roles and Features Wizard please follow the instructions below Step operation:

1. Insert the Windows Server 2012 installation media.

  2. Start the Add Roles and Features Wizard.

  3. Select the feature checkbox of .Net Framework 3.5 on the feature selection page and then click Next.

  4. On the Confirm Installation Selection page click the Specify an alternative source path link.

5. On the Specify Alternate Source Path page type the path of the SxS folder as a local path or network share path.

6. Click OK.

  7. Click Install to complete the wizard.

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