What is the registry in Windows?

The registry in Windows is fundamentally a system-defined database for configuration data. It serves as a central repository that stores important settings and options for the operating system, hardware, software applications, and user preferences. This database is structured in a hierarchical format that makes it easy for both users and the system to retrieve and update configuration settings as needed.

When the operating system starts, it reads from the registry to understand how to configure hardware components, manage installed applications, and apply user-specific settings. This makes the registry crucial for system stability and functionality. For example, values in the registry dictate how certain applications behave or how specific hardware components are configured.

This distinct characteristic of the registry sets it apart from merely being a storage location for files, a collection of software applications, or a type of file system. The registry's role is deeply integrated into the operating system's operation, facilitating configurations that affect nearly every aspect of the user experience.