I now have 2 machines running Windows 10 on my domestic LAN, and I sign in to both using my Microsoft account. I usually work from one of them, and if I need to administer the other one, I log in to it using RDP. I decided to have different theme and console background & foreground colours, at least partly so I don't get confused about which machine I am operating! Imagine my puzzlement when the settings I had made on one machine mysteriously appeared on the other and vice versa. I had skipped Windows 8 and didn't realize that if you sign in using your Microsoft account, all your Windows 10 machines will have certain settings (things like your desktop theme, browser settings, and passwords) synchronized provided that sync is enabled on each machine. (It is enabled by default). I wonder if anyone else has been surprised by this?