How to Uninstall an Update
Several updates, such as a custom Windows Installer-based update, support an uninstall operation. Use the following procedure to uninstall an update previously deployed by System Center Essentials 2007 that is no longer needed.
To uninstall an update
In the Essentials 2007 console, click Updates.
In the Updates pane, select a category containing the update that you want to uninstall.
In the Results pane, right-click the update that you want to uninstall and select Uninstall.
In the Select Groups for Uninstall dialog box, select the computer groups from which you want to uninstall the update, and then click OK.