It may not be high-level security, but you can make it much more difficult for anyone to change your display, network, printer, Device Manager, Internet options, or other settings in WindowsÆ Control Panel simply by moving a file from one folder to another. Each Control Panel applet has a file with a .cpl extension stored in the Windows/System folder. If you move a .cpl file to any other folder, the applet associated with it disappears from Control Panel. To run the applet, you simply double-click its .cpl file in Explorer.