Thank you very much, both of you, I disabled this in services.msc. It is amazing what one can find in hidden corners...
Just for general information: Terminating a Share name with a $ character actually causes it to be hidden in the normal Share listings. Admin Shares are there since the early WinNT times, but are normally invisible.
Thank you, that information I already had found. I was puzzled what "share", in connevtion with MY computer files means precisely. Especially as that informtion is intentionally hidden by, of all people, Microsoft !