Imao slicni problem s time i potrosio pola dana na to. Nakraju sam napravio posebne fodere sa permissionsima za usera i System na particijama. Evo i uputa:
1. create folder named by user name
1. enter folder Properties tab Security
2. click Advanced options
3. click Disable inheritance
4. when prompted click Convert inherited permissions into explicit ...
5. remove all entries principals except SYSTEM
6. click add and select principal
7. enter user name and check names
8. select Full control permissions (i.e. all permissions)
9. check if permissions apply to all subfolders and files