Microsoft releases Windows Home Server 2011 Computer Monitoring Error hotfix

Some users of Windows Home Server 2011 have been reporting Computing Monitoring Errors. If you are one of those users then Microsoft have just released a hotfix to cure your problem.

Symptoms

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.

Cause

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.

Resolution

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.