When a new PC running Windows 10 is going through its initial setup routine, also known as the Out Of Box Experience (OOBE), it is susceptible to to corruption of the routine it the unlikely event of a power interruption.
If a power interruption does occur during OOBE then there is a likelihood of the following on screen message being displayed during the next boot. Pressing OK at this state causes the PC reboot but it will show the same error message and so on in a loop.
The problem can be easily fixed by making a small change to a registry key.
The procedure is as follows.