Windows 7 Service Details
Connection between yourself and Domain Controller. If you need to be able to log into your domain controller, leave it alone.
Maintains a secure channel between this computer and the domain controller for authenticating users and services.
Consequences of Stopping:
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.
All services listed in 'Required For' will be unable to function