These keys are generally supported for use with retail or OEM installation media. Apart from these, there are of course, several types of volume licensing keys too for enterprise level machines.

When Windows comes preinstalled on a computer, it has a license designated for Original Equipment Manufacturers. This OEM license only works to run Windows on the computer it came with, determined by ...

This isn't piracy, of course—you still need a valid Windows license to download the ISO and register Windows. If you purchased a retail version of Windows, enter the product key from the package. If ...