How to download a Windows disk image for free

OS X Daily:

Did you know you can download a Windows 10 disc image free from Microsoft? This is seemingly little known, but yes you can download a complete legitimate Windows 10 ISO without registering or even having a product key, and you can install and run the entirety of Windows 10 using the image too.

I have not done this, but good to know, especially if you want to do a Boot Camp install to run a single application or test. Bookmark and pass along.