I am getting "Service Unavailable" after installing Notifciation Server.
Event Type: Error
Event Source: W3SVC-WP
Event Category: None
Event ID: 2269
Description: The worker process failed to initialize the http.sys communication or the w3svc communication layer and therefore could not be started. The data field contains the error number.
The worker process is configured to use an identity that is different from Local System.
The Everyone group and the User group do not have the Bypass Traverse Checking user right. By default, the Everyone group and the User group have this user right.
See also Microsoft Knowledge base fro more information: http://support.microsoft.com/kb/896286
Notification Server 6.0
Recovery Server 6.x