Guide to Installing .NET 3.5 on Windows Server 2022

If you are experiencing the following issues while installing .NET 3.5 on Windows Server 2022, follow the complete guide below:

.NET Framework 3.5 installation error: 0x800F0950

The following feature couldn't be installed: .NET Framework 3.5 (includes .NET 2.0 and 3.0)

Step 1: Download the Windows Server 2022 ISO

1. Visit the Microsoft Evaluation Center.

2. Download the ISO file.

Step 2: Mount the ISO

1. Locate the downloaded ISO file.

2. Right-click on it and select Mount.

3. Note the drive letter assigned to the mounted ISO (e.g., D:).

Step 3: Modify the Registry Editor

1. Open Registry Editor

• Press Win + R, type regedit, and press Enter.

• or use the search bar

2. Navigate to the Correct Registry Key

• Go to:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Servicing

3. Create or Modify the LocalSourcePath

• If LocalSourcePath does not exist:

1. Right-click in the right pane.

2. Select New > String Value.

3. Name it LocalSourcePath.

• Set the value of LocalSourcePath to the full path of the sources\sxs folder on your installation media.

• Example:

D:\sources\sxs

*Replace D: with the actual drive letter of your mounted ISO.

4. Ensure Group Policy Does Not Override Settings

• Open Group Policy Editor by pressing Win + R, typing gpedit.msc, and pressing Enter.

• Navigate to:

Computer Configuration > Administrative Templates > System

• Edit the policy Specify settings for optional component installation and component repair:

1. Enable the policy.

2. Set the source path to the same location (e.g., D:\sources\sxs).

5. Restart the Server

• Restart the server for the changes to take effect.

Step 4: Download the .NET Installer

1. Visit the .NET 3.5 download page.

2. Download the required installer.

Step 5: Install .NET 3.5 via Server Manager

1. Open Server Manager.

2. Select Add Roles and Features.

3. Navigate through the wizard and select .NET Framework 3.5 Features.

4. Proceed with the installation.

This guide ensures the proper setup of .NET 3.5 on your Windows Server 2022 environment.