Download Net Framework 3.5 Windows 10 64 Bit Offline Installer -

This method never touches the internet.

The safest way to get a 100% offline installer is to extract it from your Windows 10 installation ISO or USB drive. This method never touches the internet

What you need: A Windows 10 64-bit installation USB or ISO file (the same version as your PC). To save the installer files for future offline use:

Steps to extract the offline installer:

To save the installer files for future offline use: For large-scale deployments, use the same DISM command

For large-scale deployments, use the same DISM command inside a script or task sequence.