This is fascinating :-) I was wondering if they leveraged their environment subsystem framework - nice to have this confirmed!<p>A long time ago I wrote the Wikipedia article on the architecture of Windows NT. It obviously needs an update, but I think it&#x27;s still quite relevant and explains in a vastly simplified manner how Windows Fitz together.<p>It can be found here:<p><a href="https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;Architecture_of_Windows_NT" rel="nofollow">https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;Architecture_of_Windows_NT</a><p>There is a block diagram that I think is also helpful:<p><a href="https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;Architecture_of_Windows_NT#&#x2F;media&#x2F;File%3AWindows_2000_architecture.svg" rel="nofollow">https:&#x2F;&#x2F;en.m.wikipedia.org&#x2F;wiki&#x2F;Architecture_of_Windows_NT#&#x2F;...</a>