Thanks for the link. Went through the whole process and still no joy in Mudville. VirtualBox would not install, googled possible solutions to no avail.
At this point, three different vm methods have been tried to no avail.
The “normal” install method from the online Docs apparently won’t work, either.
And now I have some leftover crud I have to clean up, I guess.
Thanks for helping out but it looks like Nethserver 7 is no-go here.