Before diving into the technical steps, it is crucial to understand why you would choose an offline ISO over the default web installer.

Now that you have your ISO (on a USB or burned to a DVD), follow these steps on the target machine that has no internet.

The bootstrapper will download all necessary .vsix, .cab, and installer files. This can take hours depending on your internet speed. Do not close the window. Once finished, you’ll see a message: “The layout has been successfully created.”