Hi Micce,
I am not sure about the ping to Mark. However it seems the correct to me.
I want to add some information about what happened to me. I was trying to remove some stubborn print drivers on several Windows 10 workstations. In my case I did not do an uncheck but a delete instead. This caused the entire registry key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Monitors to be emptied. Thus resulting in all printers being greyed out. This is because there is no port association with the printers. It also caused adding a new port under print management to fail. This of course means that no new printers can be added.
The only was I have been able to recover from this is to run a repair install keeping files and programs. I have done this on a couple of critical machines.
I am hoping Mark will help with this because that is not an efficient way to correct this problem. I will try to ping him again...