Article ID: 957751 - View products that this article applies to.
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On a computer that has Antigen 9.0 with Service Pack 1 installed, the AntigenService service stops responding during startup. Later, some Exchange services, such as the Microsoft Exchange Information Store service may not work because of dependencies with the AntigenService service
To resolve this problem, install Hotfix Rollup 5 for Antigen 9.0 with Service Pack 1. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
957075Note You must install Antigen 9.0 with Service Pack 1 before you install Hotfix Rollup 5 for Antigen 9.0 with Service Pack 1.
(https://support.microsoft.com/kb/957075/ )Description of Hotfix Rollup 5 for Antigen 9.0 Service Pack 1
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.