This may happen due to a very long period of time of inactivity, a system hang leading to the service being idle and leading to the shutdown of the service.
Ensure that the system remains active and the connections remain established to complete the upgrade.
A Window is a Content Control, which means that it can contain a single object of any type (such as a string, an image, or a panel).
For more information, see the Content Control class.
Will return 2[gle=0x000000cb] 2018-05-26 , Error SP SPRecord OSFootprint: Opening setupcl request key failed.