Once the AppManager setup program launches the Windows Installer package for a component, to cancel installation of that component, click the Cancel button for the Windows Installer package. Clicking the Cancel button for the AppManager setup program will cancel installation of the components in the installation queue, but not installation of the component currently being installed.
Canceling installation of the QDB or CCDB does not undo changes that were already completed during installation. To undo changes that were already completed, use Microsoft SQL Server Management Studio to delete the QDB or CCDB. For more information about deleting the QDB or CCDB, see Uninstalling the QDB or CCDB.