Hello everyone on the forums, I'm new here. Hope you're all doing well.

When we install Windows 8 or later, Microsoft asks us to name the PC and pick a username, which later goes to "C:\Users\<username>" to store your profile specific data. Now suppose that I named my PC: Desktop and my user: Admin. Now the PC names are obviously stored by Microsoft and later used in Store App. But (1) are the users (like Admin) also tracked by Microsoft? (2) Where can I add/remove these PCs (like Desktop)? (NOT trusted PCs, just the PCs I entered my Microsoft email in while installing Windows 8) (3) Can I add/remove users (like Admin) online?