Start by clicking the Windows Start button then the "Run..." menu item. In the field next to Open, type cmd.exe and press Enter. This will open a DOS window. In the DOS window, type cd c:\aplwin10 and press Enter. The prompt should now read c:\aplwin10. If so, to register APL+Win, type aplw.exe /regserver and press Enter. This is a silent registration process so no confirmation will appear. Now you can proceed to use the APLNextSupervisor.