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

Download the offline installer

The .NET Framework 3.5 SP1 offline installer is available on the .NET Framework 3.5 SP1 Download page và is available for Windows versions prior to Windows 10.

Install the .NET Framework 3.5 on Demand

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

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Why am I getting this pop-up?

The .NET Framework is created by thuychien.vn & provides an environment for running applications. There are different versions available. Many companies develop their apps to lớn run using the .NET Framework, & these apps target a specific version. If you see this pop-up, you"re trying to lớn run an application that requires the .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 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.

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

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You don"t need lớn select the child items for Windows Communication Foundation (WCF) HTTP ActivationWindows Communication Foundation (WCF) Non-HTTPhường. Activation unless you"re a developer or VPS 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 see how lớn resolve sầu these issues.

If you still can"t resolve sầu your installation issue or you don"t have an Internet connection, you can try installing it using your Windows installation truyền thông media. For more information, see Deploy .NET Framework 3.5 by using Deployment Image Servicing & Management (DISM). If you"re using Windows 7, Windows 8.1, the lakiểm tra release Windows 10, or Windows 11, but you don"t have sầu the installation truyền thông, create an up-to-date installation media here: Create installation truyền thông media for Windows. Additional information about Windows 11 & Windows 10 Features on Demand: Features on Dem&.

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Warning

If you"re not relying on Windows Update as the source for installing the .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 & unserviceable state.