diop Have you tried W10 1511+No drivers setup on other machines? Does Windows update play nicely or are there any issues?
I've tried it on all the machines I use (2x desktop computers and 2x laptops) and it's fine. But I need multiple video outs from the desktops so I have to be careful which graphics cards I use - currently I'm using 2x Nvidia GTX 770 cards.
Also, I've updated the original post as you have to install Windows Update Blocker to stop ANY updates once you have a working setup. It disables the update service with one switch:
https://www.sordum.org/9470/windows-update-blocker-v1-5/
degen Hate to plug it all the time, but 2015 LTSB is based on 1507 and doesn't have the 1607+ composition layer shenanigans and it still gets security updates
Good shout actually - @diop you can use the LTSB version if you like, my problem was that my Nvidia graphics card isn't supported on 1507, so i have to use 1511.