Article ID: 961425 - View products that this article applies to.
Microsoft Forefront Security for Exchange Server may become unresponsive, may stop scanning mail, or may not start. Also, you may not be able to open the administrative console. If Forefront Security for Exchange Server is running in a clustered environment, you may not be able to fail over to a passive node.
When any of these issues occur, a Dr. Watson error will be generated with bucket ID 668683526 that references a crash of the FSCController.exe process.
This problem may occur because of a crash of the FSCController.exe process.
To resolve this issue, install Microsoft Forefront Security for Exchange Server with Service Pack 2 (SP2).
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/960465/ )Description of Forefront Security for Exchange Server with Service Pack 2
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.