This article applies to:

• Trustwave SEG
• Windows Server 2016
• Windows Server 2019

Question:

• How can I install .NET Framework 3.5 on Windows Servers?
• Automated installation of .NET 3.5 fails

Background:

Procedure:

To install .NET 3.5:

1. You will need a Windows distribution CD or mounted ISO image.
2. In Server Manager, select Add Roles and Features. 
3. Choose a role based installation for the local server.
4. Select the feature .NET Framework 3.5 Features.
5. On the Confirm page below the list, choose to specify an alternate source path.
   
6. Enter the drive letter of the distribution image followed by \Sources\SxS\
   for example, D:\Sources\SxS\
7. Continue installation as normal.