How To Resolve .NET Framework 3.5 installation error
This problem occurs when you try to install the Microsoft .NET Framework 3.5 on a computer that is running Windows 10, Windows Server 2016, Windows Server version 1709, Windows 8.1, Windows Server 2012 R2, Windows 8 or Windows Server 2012.
Note Installation of the Microsoft .Net framework may throw errors that are not listed in this article, but you might be able to try the following steps to fix those errors as well.
Note Installation of the Microsoft .Net framework may throw errors that are not listed in this article, but you might be able to try the following steps to fix those errors as well.
Resolutions for Windows 8.1, Windows Server 2012 R2, Windows 8 or Windows Server 2012
More Information
These errors may occur when you use an installation wizard, the Deployment Image Servicing and Management (DISM) tool, or Windows PowerShell commands to enable the .NET Framework 3.5.
In Windows 10, Windows 8.1, Windows 8, Windows Server 2012 R2, and Windows Server 2012, the .Net Framework 3.5 is a Feature on Demand. The metadata for Features on Demand is included. However, the binaries and other files associated with the feature are not included. When you enable a feature, Windows tries to contact Windows Update to download the missing information to install the feature. The network configuration and how computers are configured to install updates in the environment can affect this process. Therefore, you may encounter errors when you first install these features.
In Windows 10, Windows 8.1, Windows 8, Windows Server 2012 R2, and Windows Server 2012, the .Net Framework 3.5 is a Feature on Demand. The metadata for Features on Demand is included. However, the binaries and other files associated with the feature are not included. When you enable a feature, Windows tries to contact Windows Update to download the missing information to install the feature. The network configuration and how computers are configured to install updates in the environment can affect this process. Therefore, you may encounter errors when you first install these features.
Error messages that are associated with these error codes
| Error code | Error messages |
|---|---|
| 0x800F0906 | The source files could not be downloaded. Use the "source" option to specify the location of the files that are required to restore the feature. For more information on specifying a source location, see http://go.microsoft.com/fwlink/?LinkId=243077. The DISM log file can be found at C:\Windows\Logs\DISM\dism.log Windows couldn't complete the requested changes. Windows couldn't connect to the Internet to download necessary files. Make sure that you're connected to the Internet, and click "Retry" to try again. Installation of one or more roles, role services, or features failed. The source files could not be found. Try installing the roles, role services, or features again in a new Add Roles and Features Wizard session, and on the Confirmation page of the wizard, click "Specify an alternate source path" to specify a valid location of the source files that are required for the installation. The location must be accessible by the computer account of the destination server. 0x800F0906 - CBS_E_DOWNLOAD_FAILURE Error code: 0x800F0906 Error: 0x800f0906 |
| 0x800F081F | The source files could not be found. Use the "Source" option to specify the location of the files that are required to restore the feature. For more information on specifying a source location, see http://go.microsoft.com/fwlink/?LinkId=243077. The DISM log file can be found at C:\Windows\Logs\DISM\dism.log 0x800F081F - CBS_E_SOURCE_MISSING Error code: 0x800F081F Error: 0x800F081F |
| 0x800F0907 | DISM failed. No operation was performed. For more information, review the log file. The DISM log file can be found at C:\Windows\Logs\DISM\dism.log Because of network policy settings, Windows couldn't connect to the Internet to download files that are required to complete the requested changes. Contact your network administrator for more information. 0x800F0907 - CBS_E_GROUPPOLICY_DISALLOWED Error code: 0x800F0907 Error: 0x800F0907 |
How to download the .NET Framework 3.5 outside of the Windows Update requirement
The .NET Framework 3.5 is available for customers with Volume Licensing or MSDN Subscription, as Feature on Demand Media is available.Error codes are not listed when you install .NET Framework 3.5
When you install .NET Framework 3.5, you may encounter other error codes that are not listed in this KB, for more information, go to the following articles:- Windows Update error 80071A90
- Windows 10 upgrade and installation errors (Such as error code 0x800F0922)
- Net Framework 3.5 and 4.5 error 0x80070002
- Windows Update error 0x80073712
- Installing the .NET Framework 3.5 on Windows 8, Windows 8.1 and Windows 10
- For more information about how to plan for the deployment of the Net Framework 3.5 in your environment, check out the Microsoft .NET Framework 3.5 Deployment Considerations white paper.
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