Okay, thanks...
But also on other sites, I find the same sentence...
For example on the site:
Learn How to Take or Assign Ownership of Files and Folders
there's standing the same thing, namely:
.... Ownership can be taken or transferred in several ways. The current owner of a file or folder can transfer ownership to another user or group. ...
So I want to find the solution for this... Because probably I'm doing something wrong... But what..?
Maybe UAC? But that I disabled.. so...