The subinacl will not work for Windows 7

You can believe me or not but I did it on Windows 7 x64 Pro PL (Retail version) and on Windows 7 x32 EN (build 7100) on the same key

Originanal permissions before making these commands:Perm.txt

Result after making first command Report1.txt

Result after making second command Report2.txt

Result after restoring original permissions Report3.txt

As I said I can't explain why it not working for you .Do you have the same results in safe mode?

Thank you, i tested on other PCs, it works well!
But do not know why the home PC will not work, i will test on more PCs.

Hello Flavius:
Could you please tell how to get the full permission for a file like the Registry key?
Thank you

You have on SetACL website manual,besides you can get all switcher options if you type:

setacl -help

straight to your question:

setacl -on "<exactly path to file>" -ot file -actn setowner -ownr "n:Administrators"
setacl -on "<exactly path to file>" -ot file -actn ace -ace "n:Administrators;p:full"

If you are already owner of file of course you can ignore first command.

I surmise from the context of question you have trouble with changing permissions on any file...Well it may happen.Not all work according to theory.Maybe some file is busy and you have to try in safe mode or even in safe mode with command prompt,from System account (example from forum:Denied Access to D:\ drive )

If owner of any object is TrustedInstaller and you can't change permission in any way according to theory prediction it will be great problem,it may be caused by also WIL restriction chml: a tool to control Windows Integrity Levels
Unfortunately I can't also find Holy Grail to rule & control all permissions
....