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#11
Try running it from an Elevated Command Prompt.
Click on the Start Orb and enter cmd
At the top, under Programs, you'll see cmd.exe
Right click on it and select Run as Administrator
The Command Prompt window should look like this:
Microsoft Windows [Version 6.1.7600]
Copyright (c) 2009 Microsoft Corporation. All rights reserved.
C:\Windows\system32>
Try running the subinacl command now.