Install the .NET Framework 3.5 on Windows 10, Windows 8.1, and Windows 8

You may need the .NET Framework 3.5 to run an application on Windows 10, Windows 8.1, and Windows 8. You can also use these instructions for earlier Windows versions.

Install the .NET Framework 3.5 on Demand

You may see the following configuration dialog if you try to run an application that requires the .NET Framework 3.5. Choose Install this feature to enable the .NET Framework 3.5. This option requires an Internet connection.

.NET Framework Installation Dialog

Enable the .NET Framework 3.5 in Control Panel

You can enable the .NET Framework 3.5 through the Windows Control Panel. This option requires an Internet connection.

  1. Press the Windows key Windows Windows logo on your keyboard, type "Windows Features", and press Enter. The Turn Windows features on or off dialog box appears.

  2. Select the .NET Framework 3.5 (includes .NET 2.0 and 3.0) check box, select OK, and reboot your computer if prompted.

    Installing .NET with the control panel

    You don't need to select the child items for Windows Communication Foundation (WCF) HTTP Activation and Windows Communication Foundation (WCF) Non-HTTP Activation unless you're a developer or server administrator who requires this functionality.