The 'Do not apply during periodic background processing' option prevents the system from updating affected policies in the background while the computer is in use. When background updates are disabled, policy changes will not take effect until the next user logon or system restart. The recommended state for this setting is: Enabled: FALSE (unchecked). Rationale: Setting this option to false (unchecked) will ensure that domain policy changes take effect more quickly, as compared to waiting until the next user logon or system restart. Impact: Group Policies will be reapplied every time they are refreshed, which could have a slight impact on performance.
To establish the recommended configuration via GP, set the following UI path to Enabled, then set the Do not apply during periodic background processing option to FALSE (unchecked): Computer Configuration\Policies\Administrative Templates\System\Group Policy\Configure registry policy processing Note: This Group Policy path may not exist by default. It is provided by the Group Policy template GroupPolicy.admx/adml that is included with the Microsoft Windows 8.0 & Server 2012 (non-R2) Administrative Templates (or newer). Default Value: Disabled. (Group policies are not reapplied until the next logon or restart.)