Hi In Windows7 SP1, I noticed that the ACLs of the root directory of a logical partition (D formatted NTFS are different from those of the root directory of the system partition (C: Code: C:\Windows\system32>icacls c:\ c:\ BUILTIN\Administrators:(F) BUILTIN\Administrators:(OI)(CI)(IO)(F) NT AUTHORITY\SYSTEM:(F) NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(F) BUILTIN\Users:(OI)(CI)(RX) NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(M) NT AUTHORITY\Authenticated Users:(AD) Etichetta obbligatoria\Livello obbligatorio alto:(OI)(NP)(IO)(NW) Processing is complete for 1 file. Processing failed for file 0 C:\Windows\system32>icacls d:\ d:\ BUILTIN\Administrators:(F) BUILTIN\Administrators:(OI)(CI)(IO)(F) NT AUTHORITY\SYSTEM:(F) NT AUTHORITY\SYSTEM:(OI)(CI)(IO)(F) NT AUTHORITY\Authenticated Users:(M) NT AUTHORITY\Authenticated Users:(OI)(CI)(IO)(M) BUILTIN\Users:(RX) BUILTIN\Users:(OI)(CI)(IO)(GR,GE) Processing is complete for 1 file. Processing failed for file 0 Why? If I were to move, in the logical partition, the users profiles (except the default profile) and the public directory, should I also change its ACLs to get a stable, secure and coherent or not? In particular, I wanted to know if these differences are caused solely from the partition type or if these work even on other levels of the system and users security. Thanks Bye