Short description of RegDesk 4.0 4.0: Desktop' s answer to a lock and key? RegDesk 4.0 provides computer security of the highest order, securing opted devices and various areas of Desktop and Windows programs. Put together a foolproof desktop security system, which controls access to vital areas of Windows, and a facility that allows hiding of selected drive letters, virtual memory settings, display and network properties. This system is designed to work with the Windows desktop.