Use the following procedure to delete a rule in Essentials 2007. If a rule is from a sealed Management Pack it cannot be deleted. Use overrides to disable a rule from a sealed Management Pack. For more information about overrides, see Overrides in System Center Essentials.
To delete a rule
In the Essentials 2007 console, click the Authoring button.
In the Authoring pane, expand Authoring, expand Management Pack Objects, and then click Rules.
In the Rules pane, right-click the rule you want to delete, and then click Delete.
In the Confirm Rule Delete message, click Yes.