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Microsoft .NET Framework 3.5 contains many new features building incrementally upon .NET Framework 2.0 and 3.0, and includes .NET Framework 2.0 service pack 1 and .NET Framework 3.0 service pack 1.
Get the runtime and the web installer for .NET Framework 3.5 SP1, a software platform for building and running apps. Learn how to upgrade your apps from .NET Framework to the latest .NET with Visual Studio.
- Overview
- Download the offline installer
- Install the .NET Framework 3.5 on Demand
- Enable the .NET Framework 3.5 in Control Panel
- Troubleshoot the installation of the .NET Framework 3.5
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You may need the .NET Framework 3.5 to run an app on Windows 11, Windows 10, Windows 8.1, and Windows 8. You can also use these instructions for earlier Windows versions.
The .NET Framework 3.5 SP1 offline installer is available on the .NET Framework 3.5 SP1 Download page and is available for Windows versions prior to Windows 10.
Why am I getting this pop-up?
The .NET Framework is created by Microsoft and provides an environment for running applications. There are different versions available. Many companies develop their apps to run using the .NET Framework, and these apps target a specific version. If you see this pop-up, you're trying to run an application that requires .NET Framework version 3.5, but that version is not installed on your system.
You can enable the .NET Framework 3.5 through the Windows Control Panel. This option requires an Internet connection.
1.Press the Windows key 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.
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.
During installation, you may encounter error 0x800f0906, 0x800f0907, 0x800f081f, or 0x800F0922, in which case refer to .NET Framework 3.5 installation error: 0x800f0906, 0x800f0907, or 0x800f081f to see how to resolve these issues.
If you still can't resolve your installation issue or you don't have an Internet connection, you can try installing it using your Windows installation media. For more information, see Deploy .NET Framework 3.5 by using Deployment Image Servicing and Management (DISM). If you're using Windows 7, Windows 8.1, the latest release Windows 10, or Windows 11, but you don't have the installation media, create an up-to-date installation media here: Create installation media for Windows. Additional information about Windows 11 and Windows 10 Features on Demand: Features on Demand.
Warning
If you're not relying on Windows Update as the source for installing .NET Framework 3.5, you must ensure to strictly use sources from the same corresponding Windows operating system version. Using sources from a different Windows operating system version will either install a mismatched version of .NET Framework 3.5 or cause the installation to fail, leaving the system in an unsupported and unserviceable state.
Learn how to enable .NET Framework 3.5 on Windows 11, Windows 10, Windows 8.1, and Windows 8 to run apps that require this version. Follow the steps to install on demand, in Control Panel, or use the offline installer.
Download the latest update for .NET Framework 3.5 that includes new features and improvements for ASP.NET, WPF, Entity Framework, LINQ, and more. See the system requirements, install instructions, and known issues before you install the service pack.
Mar 12, 2024 · Learn how to install .NET Framework 3.5 (includes .NET 2.0 and 3.0) on Windows 11/10 and Windows Server 2022/2019/2016. See different methods, commands, and troubleshooting tips for online and offline installation.
Follow the instructions to install .NET Framework 3.5 on Windows 10, which supports apps built for the .NET Framework 1.0 through 3.5. Learn about the latest available versions of the .NET Framework, their compatibility and how to troubleshoot installation issues.
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Dec 1, 2022 · Learn how to install .NET Framework 3.5 on Windows 11, which supports apps built for .NET Framework 2.0 through 3.5. Follow the instructions and see also the links for .NET Framework 4.8, troubleshooting, and GitHub.
