TechMicrosoftMicrosoft releases Computer Monitoring Error hotfix for SBS 2011...

Microsoft releases Computer Monitoring Error hotfix for SBS 2011 Essentials and Storage Server 2008 R2 Essentials


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Yesterday we told you that some users of Windows Home Server 2011 have been reporting Computing Monitoring Errors and that Microsoft have just released a hotfix to cure the problem. They also released versions of the hotfix of those Small Business Server 2011 Essentials and Storage Server 2008 R2 Essentials users with the same issue.



After you updated a server that is running Windows Home Server 2011 with the Update Rollup 2 for Home Server 2011, you receive the warning “Computer Monitoring Error” in the Home Server 2011 Launchpad or Dashboard. You receive this warning every 30 minutes.
This happens after the system installs Update Rollup 2. You find the following exceptions in the SharedServiceHost-AlertServiceConfig.log file.

120222.003152.9814: NetworkHealthEngine: Exception happened in Microsoft.WindowsServerSolutions.NetworkHealth.Engine.BinaryActionDefinition: System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.WindowsServerSolutions.Servicing.Alerts.MacClientUpdateCondition.Run(IActionContext context)

Additionally, this can occur when you have removed a previously connected network computer from the server.
The log file is located in the following folder:

%Programdata%\Microsoft\Windows Server\Logs

You do not receive a warning reminding you to update your Mac client connector. There is no effect on other alerts or product features.


This occurs when one of the Alert evaluation components in Home Server 2011 tries to iterate through the records of all client computers in the network. It throws an unhandled exception when the component accesses the record of a client computer that was removed.


A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem.

You must submit a request to Microsoft Customer Service and Support to obtain the hotfix.

The Hotfix is available for Windows Storage Server 2008 R2 Essentials located here…

And Small Business Server 2011 Essentials located here…

Thanks to IT Beast for finding the links!

Andrew Edney
Andrew Edney
I am the owner and editor of this site. I have been interested in gadgets and tech since I was a little kid. I have also written a number of books on various tech subjects. I also blog for The Huffington Post and for FHM. And I am honoured to be a Microsoft MVP since January 2008 - again this year as an Xbox MVP.


  1. Glad I could help, There some us who use that use the other iterations of the Home Server 2011 (Like Me) that the Hotfix for WHS2011 does not work on. Thanks again Andy!

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