What should I do if Win8 has 0x800F0907 error when installing .NET 3.5?

Cause Analysis:

In Windows 8 and Windows Server 2012, .Net Framework 3.5 is an on-demand feature. Metadata based on functionality is included with Windows 8 and Windows Server 2012. However, binaries and other files associated with the feature are not included. When this feature is enabled, Windows will attempt to download the missing information to install the Windows update for that feature, and an error may occur.

Network configuration and computer installation of updates in this configuration environment can affect this process, so you may encounter errors when you first install this feature.

Solution:

If no other installation source is specified, or is invalid, if the optional component's installation and repair component specifies the setting Group Policy settings are configured as " never try from Windows Update Download the load. ", this error code occurs

To resolve this issue, review the policy settings to determine if it is appropriate for your environment. If you do not want to download the feature payload from Windows Update, consider configuring the "alternate source file path" value in the Group Policy settings.

Note You must be a member of the Group Policy Settings Administrators group on the local computer. If you control the Group Policy settings for the computers you want to manage at the domain level, contact your system administrator.

Perform the following steps:

1. Start the Local Group Policy Editor or the Group Policy Management Console, if applicable, in your environment.

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

3. Open the Install and Repair component of the optional component Specify Settings Group Policy settings and then select Enable.

4. Decide if you will never try to download Group Policy settings from the Windows Update payload enabled, and then determine the settings that are appropriate for your environment.

5. If you want to specify an alternate file in the Alternate File Path box, specify the shared folder to contain the fully qualified path from the contents of the sourcessxs folder of the installation media. Or, specify a WIM file. To specify a WIM file as an alternate source file location, add a path prefixed with WIM: and then add an index of the image you want to use as a suffix in the WIM file. The following are examples of values ​​you can specify:

Path to the shared folder: server_nameshareWin8sxs

The WIM file, which 3 paths represent the index of the image in which to find the function file: WIM: Server_nameshareinstall.wim:3

6. If necessary, select the Windows Update contact to download the repair content instead of the Windows Server Update Services (WSUS) check box.

7. Click or click OK.

8. At an elevated command prompt, type the following command, then press ENTER to apply the policy immediately: gpupdate /force