How to implement the return of the system to its original state after a reboot?

Question

Windows

Task: to implement on school computers the state that was at the time of loading, with the removal of all changes made by the user, i.e. to "every time is like the first time". OS - Windows 10, no domain. You need free software (no one will allocate 146% for paid money), or implement it at the OS level (how and what to google in this case?)
PS If you use a domain, can the question be solved somehow differently?

Answer 1

Have a look: https://samforum.org/showthread.php?t=30911