Here's another Operations Manager 2007 issue you might want to keep your eyes open for:

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Symptoms: When attempting to deploy a System Center Operations Manager 2007 Service Pack 1 agent the deployment succeeds but the HealthService fails to start with the following Service Control Manager event logged:

Event Type:        Error
Event Source:      Service Control Manager
Event Category:   None
Event ID:            7024
Date:                  dd-mm-yyyy
Time:                  hh:mm:ss
User:                  N/A
Computer:           [computername]
Description:          The OpsMgr Health Service service terminated with service-specific error 3 (0x3).

Cause: The role to which the agent had been deployed was an Operations Manager 2007 Standalone Operations Database role which has not had Operations Manager 2007 SP1 applied.

Resolution: Uninstall the Operations Manager agent from the database server role, then apply Operations Manager 2007 Service Pack 1 to the server by running SP1Upgrade.exe from the Service Pack 1 upgrade media.  Once Service Pack 1 has been applied to the server, re-deploy the SP1 agent.

References: http://technet.microsoft.com/en-us/library/bb822001.aspx

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J.C. Hornbeck | Manageability Knowledge Engineer