Maintains a secure channel between this computer and the domain controller for authenticating users and services. If this service is stopped, the computer may not authenticate users and services and the domain controller cannot register DNS records. If this service is disabled, any services that explicitly depend on it will fail to start. Fix: (1) GPO: Computer Configuration\Windows Settings\Security Settings\System Services!Netlogon (2) REG: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\Netlogon!Start