You can disable Master Profile at any time as follows:
Log onto each PC that shares the master profile.
Run the Configuration Wizard to disable Master Profile as follows:
Remove the path and file name for the shared Master Profile file
Deselect the check box to disable Master Profile write access (if selected)
Start the console. When the console starts up it will import the Configuration Wizard XML file and the console will start with Master Profile disabled.
Now when other users start the console on the same PC, Master Profile will be automatically disabled when users start their console.