definition of registry

Definition of Registry in Windows

Windows Registry is a hierarchical database that stores low-level settings for the Microsoft Windows OS (operating system) and for applications that choose to use the registry keys. The kernel drivers security service account manager and user interface can use the registry. The registry also allows access to counters for system profiles.


In other words, The Definition of windows Registry - the Windows registry contains information settings options and other values ​​for software programs and hardware that are installed on all versions of Microsoft Windows OS (operating systems). 


For example when a program is installed a new subkey that contains settings such as the program's location and how to run the program are all added to the Windows registry.


When introduced with Windows 3.1 the Windows registry mainly kept the configuration information for COM-based components. Windows 95 and Windows NT expanded their use to rationalize and centralize information in a plethora of INI files which held the configurations for individual programs and were stored in different locations. 


Windows applications are not required to use the Windows registry. For example .NET Framework applications use XML files for configuration purposes whereas mobile applications typically keep their configuration files running.


Setting up the registry

The Windows registry is a settings repository used by Microsoft Windows. It stores configurations for hardware devices installed applications and the Windows OS (operating system). Registry provides a central method of storing custom preferences for each Windows user rather than storing them as individual INI files.


The Windows registry is built as a hierarchy that includes several top-level categories also known as "hives." Each one starts with "HKEY", short for "Handle to Registry Key". Some versions of Windows have seven top-level categories while Windows 10 has five. These include:


HKEY_CLASSES_ROOT

• Stores file associations which link file extensions to default programs

• Stores configurations for Component Object Model objects such as Microsoft ActiveX components and OLE documents


HKEY_CURRENT_USER

• Stores user-level preferences selected using Control Panel

• Stores the user-level network and printer settings


HKEY_LOCAL_MACHINE

• Stores system settings and applications that apply to all users

• Store network-level network and printer settings


HKEY_USERS

• Temporarily saves settings for active users (those currently logged in)


HKEY_CURRENT_CONFIG

• Stores differences between the standard hardware configuration and the current hardware configuration


The Windows operating system and installed programs can modify the registry directly. For example, changing the default program for a specific file extension will automatically update the registry. 


Therefore it is usually not necessary to edit the Windows registry. However, power users may want to manually view and configure some registry settings. Windows provides a Registry Editor tool (regedit.exe) for viewing and editing registry data. This utility can also import and export settings from existing configurations. I hope you like the definition of windows registry.

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