What happens when a 0x800f0906 error occurs when WIN8 installed. NET 3.5?

Reason Analysis:

In Windows 8 and Windows Server 2012, the. Net Framework 3.5 is an on-demand feature. Depending on the functionality of the metadata is contained in Windows 8 and Windows Server 2012. However, binaries and other files associated with the feature are not included. When you enable this feature, Windows will attempt to download the missing information to install the Windows update for that feature, and you may receive an error.

The network configuration and the installation of the update by the computer in such a configuration environment may affect this process, so you may encounter errors when you first install this feature.

Solution:

This error code appears because the computer is unable to download the required files from Windows Update.

This behavior can be caused by the failure of a network, proxy server, or firewall configuration or through a network, proxy server, or firewall.

This behavior can also be caused by configuring the computer to use Windows Server Update Service (WSUS) instead of the Microsoft Windows Update server as a service-providing system administrator. In this case, contact your system administrator and request them to enable the installation and repair components for the optional components specify set Group Policy settings and configure alternate source file path values, or choose to download the fix content directly from Windows Update instead of the Windows Server Update Service (WSUS) option.

To configure Group Policy settings, follow these steps:

1. Start the local Group Policy Editor or the Group Policy Management Console, enter gpedit.msc-OK.

2. Expand the Computer Configuration, expand the Administrative Templates, and then select the system.

3. Open installation and repair components for optional components specify set Group Policy settings, and then select Enable.

4. If you want to specify a source file in the alternate file path box, alternatively, specify that the shared folder contains a fully qualified path from the content in the Sourcessxs folder of the installation media. Optionally, specify a WIM file. To specify the WIM file for the alternate source file location, add the path of the prefix WIM:, and then add the index of the image you want to use as a suffix in the WIM file. The following are examples of the values you can specify:

A. Path to shared folders: Server_namesharewin8sxs

B. WIM file, which 3 of the paths represent the index of the image in which to find the feature file: Wim:server_nameshareinstall.wim:3

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

6. Please click or click OK.

7. At the 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 a file source when the. NET Framework 3.5 feature is enabled. Please perform the following steps:

1. Insert 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

Note In this command, is a placeholder for the DVD drive or the drive letter that will install the Windows 8 media. For example, you can run the following command:

Dism/online/enable-feature/featurename:netfx3/all/source:d:sourcessxs/limitaccess

Steps for Windows Server 2012

In Windows Server 2012, you can also specify alternate sources by using Windows PowerShell Cmdlts or by using the Add Roles and Features Wizard.

To use Windows PowerShell, follow these steps:

1. Insert Windows Server 2012 installation media.

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

Set up windowsfeature–net Framework nuclear Name–source:sourcessxs

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

Install-windowsfeature–name Net-framework-core–source D:sourcessxs

Using the Add Roles and Features wizard, follow these steps:

1. Insert Windows Server 2012 installation media.

2. Start the Add roles and Features Wizard.

3. On the Select Feature page, select the features of the. Net Framework 3.5 check box, and then click Next.

4. On the Confirm Installation Selection page, click to specify an alternate source path link.

5. Type the path of the SxS folder as a local path or a network share path on the specified alternate source path page.

6. Click OK.

7. Click Install to complete the wizard.