Windows Registry is a unique feature to windows and is the most important part of the windows operating system. It is a kind of a database which is used to keep settings, options and configurations for all applications, user accounts preferences, hardware configurations, the operating system related important configurations, etc. Whenever the user makes changes in the Control Panel settings, or to the file associations or to any of the system policies, or install/uninstall softwares the configurations are stored in the windows registry.