Which Windows component contains profiles for each user, installed applications, and the types of documents each can create?

• A. Windows Registry
• B. Event Viewer
• C. Device Manager
• D. Task Scheduler

Answer: (A)

The Windows Registry is the centralized database that stores configuration settings for the operating system and applications. It holds user-specific information, including profiles and preferences, under keys that represent each user (and their current user hive). It also contains details about installed applications, including per-user software settings and uninstall information, stored in software-related keys in both the machine-wide and per-user hives. Additionally, file type associations—the kinds of documents a user can create and which programs open them—are recorded in the registry, allowing Windows to map file extensions to applications.

Other options handle different things: Event Viewer shows system and application logs, Device Manager lists hardware components, and Task Scheduler manages automated tasks. The registry uniquely ties together user profiles, installed software, and document associations, making it the best match.