Which root folder (hive) of registry editor contains a vast array of configuration information for the system, including hardware settings and software settings?

The HKEYLOCALMACHINE (HKLM) hive contains configuration data specific to the local computer, which is applied globally to all users. It serves as the central repository for a vast array of system information, including the hardware configuration (detected devices, drivers, and resources under the HARDWARE and SYSTEM subkeys) and system-wide software settings (under the SOFTWARE subkey). This information is critical for the boot process and system operation, independent of which user is logged on. The settings stored here define the machine's behavior and resources.

A. HKEYUSERS: This hive contains the user-specific configuration profiles for all user accounts on the machine, not the system-wide hardware and software settings.
B. HKEYCURRENTUSER: This is a subkey of HKEYUSERS that points to the profile of the currently logged-on user, containing their personal preferences and settings.
D. HKEY-CURRENTCONFIG: This is a pointer to the current hardware profile within HKEYLOCALMACHINE, not the comprehensive repository for all hardware and software settings.

1. Microsoft Corporation. (2021, September 15). Registry Hives. Microsoft Learn. Retrieved from https://learn.microsoft.com/en-us/windows/win32/sysinfo/registry-hives.

Section: "Standard Hives". This document explicitly states, "HKEYLOCALMACHINE... Contains configuration information particular to the computer (for any user)." It details the subkeys like HARDWARE, SOFTWARE, and SYSTEM, which directly correspond to the information requested in the question.

2. Russinovich, M. E., Solomon, D. A., & Ionescu, A. (2017). Windows Internals, Part 1 (7th ed.). Microsoft Press.

Chapter 5, "Management Mechanisms," Section: "Registry." This authoritative text describes HKEYLOCALMACHINE as the hive containing the system's non-user-specific configuration database, including the hardware configuration loaded by the kernel and system-wide software settings.

3. Carnegie Mellon University, Software Engineering Institute. (2010). The Windows Registry. CERT Forensics Document.

Section: "Registry Organization." University courseware and technical reports often reference HKLM as the primary location for machine-specific data. This document outlines that HKLM contains "all the configuration data for the local machine," distinguishing it from the user-specific hives.