HKEY_CLASSES_ROOT

HKEY_CLASSES_ROOT (HKCR) is a section within the Windows Registry that manages how the operating system handles different file types and associated programs. It contains information about file extensions (like .txt or .docx) and links them to the applications that open them. Essentially, it acts as a directory that tells Windows what to do when you open a specific file, ensuring files are associated with the correct programs. HKCR combines data from other registry areas and provides a centralized reference for file associations and COM objects, helping Windows run smoothly with different file types and applications.