Block the time change with live

Instantly if you start on the computer, any, Mate’s live or install on dual boot mate the system time is inexorably changed. This is a problem. When I do it on my computer, it fits the variable, even if it’s annoying, but on a friend’s computer it is not good to let things be found.
I hope that in the next version this incoherent is resolved. The time has to remain the one present and possibly changed by the user.
The problem also arises with Mate installed in dual boot, it is really annoying.
Thank you…