HTTP Error 503. The service is unavailable
Additionally, the Application log has the following error:
Log Name: Application
Source: Microsoft-Windows-IIS-W3SVC-WP
Date: 5/28/2014 1:07:29 PM
Event ID: 2280
Task Category: None
Level: Error
Keywords: Classic
User: N/A
Computer: evserver
Description:
The Module DLL C:\WINDOWS\System32\inetsrv\HipIISEngineStub.dll failed to load. The data is the error.
The HipIISEngineStub.dll referenced in the Event is a McAfee file that causes the issue within IIS.
To resolve this issue, refer to the workaround section in the following McAfee article KB72677: