How to boot without saving changes?

Question

Windows

Once upon a time I did the following things (I describe approximately, because I remember vaguely, and Google gives out nonsense):
1) Choose a directory to track changes;
2) You load with some parameters;
....
3) PROFIT. Whatever I do, at the next boot, Windows does Rollback to the state that was in point 1.
Can you tell me what this feature is called?
PS No, this is not a system restore. All manipulations were done without third-party software.

Answer 1

It's called a shadow defender
. Probably her and yuzal

Answer 2

Windows Sandbox on Win 10?

Answer 3

iCore Virtual Accounts - only under Windows XP SP3!

Answer 4

I only know the maximum of the guest's bead, which creates a temporary profile before rebooting, I don’t remember such a system for the system without built-in software.