How to change number format for all users?(Windows 10)

From https://superuser.com/questions/1285747/how-to-change-number-format-for-all-userswindows-10

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For the current user and all future users that will be added, it is enough to change the setting in Control Panel → Region → Additional settings, change Decimal symbol, and click OK.

For existing user profiles, if there are too many to manually repeat this operation for each one, you could set up a Login script that does the operation.

Create a registry .reg file with the required registry changes, say that it is named changedecimal.reg and contains :

Windows Registry Editor Version 5.00

[HKEY_CURRENT_USER\Control Panel\International]
"sDecimal"="."

Then do the following :

• In the Windows Start menu, enter Edit group policy
• In the Local Group Policy Editor, navigate to User Configuration > Windows Settings > Scripts.
• Double-click Logon
• Click Add...
• Click Browse...
• Navigate to and click on changedecimal.reg, then on Open
• Click OK.

From now on, the decimal separator will be reset to . for every user when he does logon. You will need to use an administrator logon account to effect this change.