You can get the . NET Framework 3.5 payload files from Windows Update or the installation media in the \sources\sxs folder. Microsoft Learn
I’ll clarify what this means in practice and how to properly handle CAB files for .NET 3.5 deployment, particularly on or Windows Server systems where .NET 3.5 is not enabled by default.
Let’s debunk frequent misconceptions:
"Install Roles and Features" → Specify .NET 3.5 → Source path points to CAB folder.
Blocked Drains St Albans