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On a computer that is running Microsoft Antigen 9.0 for Exchange Service Pack 1or Antigen 9.0 for SMTP Gateways Service Pack 1, you update the SpamCure scan engine. However, during the update of the SpamCure scan engine, the SpamCure engine does not correctly initialize itself. Therefore, when you try to update the SpamCure scan engine, an error is returned, and the engine update is rolled back.
This problem occurs because the AseSpamCure.dll library is still loaded in memory during an update of the SpamCure engine.
This problem is fixed in Hotfix Rollup 5 for Antigen with 9.0 Service Pack 1. For more information, click the following article number to view the article in the Microsoft Knowledge Base:
957075 Description of Hotfix Rollup 5 for Antigen 9.0 with Service Pack 1
Note You must install Antigen 9.0 with Service Pack 1 before you install Hotfix Rollup 5 for Antigen 9.0 with Service Pack 1.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.