I have disabled auto update in Settings.

I have then checked synch in Control Panel.

Around 36 hours later, the time changed forward by one day.

Looking at Settings, auto was again turned...

I do not have dual boot. Only Win 10.

I have had this problem since purchase of a new laptop pre installed with Windows 10. Within 2 days the date had changed to 14 days in advance. Since then, every few days it changes different...