Microsoft released Windows 10 build 10565 a few days ago for the Insiders who are registered in the Fast Ring.
So as usual, the new build was only available through Windows Update for those who allow installing preview builds on their computers.
Today, however, company, for the first time released the ISO files while the build is still under development. So basically it allows you to perform a clean installation of the new operating system Windows 10 build 10565.
Note that Microsoft is not releasing commonly released ISO releases for Windows 10 versions available exclusively for Fast Ring users. But this time the company says it has decided because there were many requests from dissatisfied users who could not activate previous builds.
"We do not usually have ISO for Fast Ring builds, but we have heard that it would be helpful to try out new activation modes."
explained Gabe Aul, head of the Windows program Insider.
For all those interested below there are download links
Download links
If you wish to download ISO in a different language, you can do it by clicking the link below. (No ISO in English)
https://www.microsoft.com/en-us/software-download/windowsinsiderpreviewiso