Windows Server 2019： .NET Framework 3.5 installation module (Internet connection environment)

“Microsoft .NET Framework” is a software development and execution program provided by Microsoft for free. It is a role like a part required to operate Windows software

.NET Framework 3.5 Features may be required depending on the application running on Windows Server 2019. By default, Windows Server 2019 has “.NET Framework 4.7 Features” installed and .NET Framework 3.5 Features not installed. Install .NET Framework 3.5 Features according to your system requirements. This time, I will explain how to install “.NET Framework 3.5” manually in an environment where you can connect to the Internet ※ In an environment where you can connect to the Internet, you do not need to use the physical OS installation disk or ISO file.

[Internet connection environment] Windows Server 2019： .NET Framework 3.5 install

Step 1:
Select the Windows mark at the bottom left of the desktop screen

Step 2:
Select Server Manager

Step 3:
Select Add roles and features

Step 4:
Before you begin screen: Select Next

Step 5:
Select installation type screen: Select Role-based or feature-based installation -> Next.

Step 6:
Select destination server screen: Select a server from the server pool -> Select Next

Step 7:
Select server roles screen: Select Next without selecting anything

Step 8:
Select .NET Framework3.5 Features –> Select Next

You can check the confirmation method after installation on the “Add Roles and Features Wizard” screen. After installation, the checkbox will be (enabled). ※It is not displayed in Control Panel -> “Programs and Features”.

Step 9:
Confirm installation selections screen: Select Install

Installation progress screen: The installation will start. Wait a moment for the process to finish

If you execute it in an environment where you cannot connect to the Internet (external communication is blocked), the files required for installation cannot be downloaded and executed, so the error code: “0x800f0950” is output and an error occurs during installation and the installation fails. It can be installed by using the OS installation disc or ISO file in an environment where internet connection is not possible

Step 10:
Installation progress screen: Installation is complete. Select Close