when you buy something from the Microsoft store a note is placed on the system that basically says; account X, purchased software Y with credit Z
you don't have permission to;
- take control
- move
- look at
- change i.e put anything in or take anything out or
- delete [this Is possible with hacking skill] but Microsoft will just put it back
if what you are bashing your head against is one of these files then forget it mate... format the drive or just learn to live with it being there