Yes, this is correct. But you can disable this is energy settings (control panel, not in the settings yet) and you should, especially if you are using a SSD as it causes many(?) GB written each time you "shutdown" your PC.AND with Windows 10 it HAS to be a restart because a shutdown in Win10 by default (to my understanding) is a form of sleep or hibernation so that it can boot quickly. But this causes the OS not to be fully refreshed hence the required restart.
Yes, this is correct. But you can disable this is energy settings (control panel, not in the settings yet) and you should, especially if you are using a SSD as it causes many(?) GB written each time you "shutdown" your PC.