You can remove the security tab in Windows Explorer to prevent
user from modifying the security permissions of a file or folder.
This tweak is user profile related and modified under Current User.

To remove the security tab click your way down to the key below :


- HKEY_CURRENT_USER\Software\Microsoft\Windows
\CurrentVersion\Policies\Explorer\


Create / modify here in the right pane the entry :


NoSecurityTab


(create : right click , new , REG_DWORD [DWord Value] and name it as above)

Doubleclick this entry and set it's value to 1 to apply the restriction.
Setting the value to 0 will show the tab again.

If it does not work after closing registry,you should at least log off / log on!