The Disallow user override of locale settings machine setting should be configured correctly. This policy prevents the user from customizing their locale by changing their user overrides. Any existing overrides in place when this policy is enabled will be frozen. To remove existing user overrides, first reset the user(s) values to the defaults and then apply this policy. When this policy is enabled, users may still choose alternate locales installed on the system unless prevented by other policies, however they will be unable to customize those choices. If this policy is Enabled, then the user cannot customize their user locale with user overrides. If this policy is Disabled or Not Configured, then the user can customize their user locale overrides. Fix: (1) GPO: Computer Configuration\Administrative Templates\System\Locale Services\Disallow user override of locale settings (2) KEY: HKLM\Software\Policies\Microsoft\Control Panel\International\PreventUserOverrides