Something interesting that you may want to know about is the computer was doing something different in the background (not Malwarebytes) and seemed sluggish so I did a restart. Before shutting down it displayed the blue "Preparing to configure Windows, Do not turn off your computer." message and took a few minutes to switch to the blue "Shutting down . . . " window, and took another couple minutes to restart.
I've not seen it do anything resembling a Windows update since restoring the C: drive. I'm not sure if this means anything but wanted you to know.