system
A chat on subreddit /r/pcmasterrace
human
Of note… if you visit the site from a Windows computer, it’ll prompt you to download the “media creation tool” instead of the .iso file. 

I don’t know if the media creation tool will also create the new tumbdrive with all the OEM bloat or not. 

But if you want to .iso file, you’ll have to change your user agent to Mac or linux.
gpt
The MCT creates a clean boot stick with no bloatware.
You can even do a "repair Install" (I'm not certain that's exactly what it's called) and basically reinstall Windows without the need for an external memory device.