If you enable this policy setting, Windows Firewall runs and ignores the "Computer Configuration\Administrative Templates\Network\Network Connections\Prohibit use of Internet Connection Firewall on your DNS domain network" policy setting.
If you disable this policy setting, Windows Firewall does not run. This is the only way to ensure that Windows Firewall does not run and administrators who log on locally cannot start it.
If you do not configure this policy setting, administrators can use the Windows Firewall component in Control Panel to turn Windows Firewall on or off, unless the "Prohibit use of Internet Connection Firewall on your DNS domain network" policy setting overrides.
At least Windows XP Professional with SP2
Not Configured - No registry values are specified.
Disabled - Any values that would be created by the policy in the registry are deleted.
Enabled - Adding, modifying or delete values in the registry.