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MVP David Allen's weblog advising onAfter implementing Operations Manager in your environment you may find some of your servers experiencing WMI problems. This can result in not being able to collect data or monitor what you need as the WMI queries in the rules and monitors will fail.
Here are some simple command sets to reset and re-register WMI which in my experience I have found to solve many WMI issues.
03 Aug, 2008 | David