Triggering an install instructs the OS to fetch files via Windows Update.
Here is the 30-second fix using Command Prompt: framework 3.5 offline
Struggling with the "0x800F0906" error? Learn how to install .NET Framework 3.5 offline using the DISM command and a Windows ISO file. No internet connection needed. Triggering an install instructs the OS to fetch
The .NET Framework 3.5 requires:
This guide will show you how to install .NET Framework 3.5 completely offline using the Windows installation media. Programs and Features
On : Go to Control Panel > Programs > Programs and Features, then click on "Turn Windows features on or off." Check ".NET Framework 3.5 (includes .NET 2.0 and 3.0)" and follow the prompts.