Holy smokes! It works now!
Thanks Peter , Manisandher, CoenP for your assistance.
What was the trick?
That final "s" on administrators was important...BUT...in Danish the plural of administrator is with "er" in the end...
Typing that like shown here it was accepted, and after a reboot music was flowing instead of the usual warnings.
With straight Contiguous I can go up to 130Mb SFS. Is that about normal with 8Gb memory?
Now it is time for some serious listening!!
Ntrights +r SeLockMemoryPrivilege -u Administrator
er/Jan