Download Microsoft-windows-netfx3-ondemand-package.cab -

Yes, stash it on your IT deployment share or USB stick. You’ll likely need it for legacy apps, especially on offline PCs, factory floor terminals, or secure workstations without internet.

You need administrator privileges. Use either method below. Download Microsoft-windows-netfx3-ondemand-package.cab

After running DISM, you can also double-check via: Control Panel > Programs and Features > Turn Windows features on or off – Ensure “.NET Framework 3.5 (includes .NET 2.0 and 3.0)” is checked. Yes, stash it on your IT deployment share or USB stick