In the event that you replace a hard disk drive or your computer fails to the point where it cannot be used or does not start ...

In the event that you replace a hard disk drive or your computer fails to the point where it cannot be used or does not start up, the Client Computer Restore service helps restore the system from a previous backup of the computer.

After you click Start, the Client Computer Restore service is installed and configured in the background. You can dismiss the dialog and reopen it to check the configuration status.