WPD is a free program for Microsoft's Windows operating system that lets users tweak privacy related settings and features. It is a portable program that you can run from any location; it requires no installation. The program displays its four main sections privacy, firewall, apps and tweaker on start. The program uses a simple slider system when it comes to most settings. A blue slider indicates that a setting or feature is enabled, a white one that it is disabled and not available. The privacy group of tweaks is divided into Group Policy, Services, and Scheduler switches.