# Windows – Prevent Windows from resetting date format settings on restart

regional settingswindowswindows 8.1

My Windows 8.1 machine has its region set to English (United States). The default date format is dd/MM/yyyy, but I modify the date format to a different setting. In this case, dd-MMM-yyyy.

It seems that on every reboot, the date format reverts back to the default format of dd/MM/yyyy.

How can I prevent the date format from reverting to the default?

• this machine is on a domain, and it is subject to Group Policies set by domain admins. I cannot determine if these is a GP being pushed to the machine.
• my account is in the local Administrators, and can set GP settings if needed
• reboots typically happen after monthly Windows updates