Install

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You may need the .NET Framework 3.5 khổng lồ run an ứng dụng on Windows 11, Windows 10, Windows 8.1, and Windows 8. You can also use these instructions for earlier Windows versions.

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Download the offline installer

The .NET Framework 3.5 SP1 offline installer is available on the .NET Framework 3.5 SP1 tải về page & is available for Windows versions prior to lớn Windows 10.

Install the .NET Framework 3.5 on Demand

You may see the following configuration dialog if you try to lớn run an ứng dụng that requires .NET Framework 3.5. Choose Install this feature khổng lồ enable .NET Framework 3.5. This option requires an mạng internet connection.

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Why am I getting this pop-up?

The .NET Framework is created by zagranmama.com và provides an environment for running applications. There are different versions available. Many companies develop their apps khổng lồ run using the .NET Framework, và 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.

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 mạng internet connection.

Press the Windows key

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

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

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You don"t need khổng lồ 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.

Troubleshoot the installation of the .NET Framework 3.5

During installation, you may encounter error 0x800f0906, 0x800f0907, 0x800f081f, or 0x800F0922, in which case refer to lớn .NET Framework 3.5 installation error: 0x800f0906, 0x800f0907, or 0x800f081f to lớn see how to lớn resolve these issues.

If you still can"t resolve your installation issue or you don"t have an mạng 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 và 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 truyền thông media here: Create installation media for Windows. Additional information about Windows 11 và 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 lớn 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 khổng lồ fail, leaving the system in an unsupported and unserviceable state.