The Super User homepage says "for computer enthusiasts and power users". https://superuser.com/
But, where do Windows admins and professionals ask questions?
I searched "Find a Stack Exchange community", but I only found Windows Phone:
I also tried microsoft.stackexchange.com (since there exists an apple.stackexchange.com), but it wasn't found either.
I also tried windows.stackexhange.com, just in case, and got "Couldn't find windows.stackexchange.com"