I am puzzled by the registry entries I have for mounted devices which I can change in line with the tutorial.
Here is my screen shot from Disk management showing option for changing "N".
Below are the mounted volumes. So far fine and consistent.
But the "mounted devices" in the registry include many unmounted devices except the unmounted (B, O, P, Q, R, W).
It also appears you can then make changes to unmounted device letters.
Can you shed any light on this?