Windows Registry File Viewer (formerly Registry Viewer) allows to read files containing Windows 9x,NT,2K,XP,2K3 registry hives. It extracts many useful information about configuration and windows installation settings of host machine.
Registry hive can be exported into REGEDIT4 format. Every topic data can be saved to CSV. It's designed in Multiple Document Interface.

The program also allows you to explore the security records. In order to view most of the supported files, you need to create a copy of them first, as they cannot be used while they are used by the NT/2000/XP system.

Here are described individual explorers:
1. File Information
In this explorer you can see basic file properties and checksums.

2. Security Record Explorer
Displays all security records used in registry. Usage counter, owner SID, group SID, list of affected keys and list of SACL and DACL is displayed for every record with flags and permissions enumerated. This explorer is available only for NT based system registry hives.

3. SAM
Displays Machine SID and part of SYSKEY. Enumerates local user and group accounts and some of their properties. This explorer is available only for NT based system registry SAM hive.

4. Windows Instalation
Displays Windows name, ID and key, install date and user registration info. Enumerates installed software with descriptions and install date and list of installed hotfixes wih description. This explorer is available only SOFTWARE registry hive (Product ID and key are extracted in SYSTEM hive too).

5. Hardware
Displays quick overview (CPU, Monitors, Video and Sound card and Network cards) and full device map of configured devices that worked on host machine. They are displayed in "like Device Manager" tree with some properties. This explorer is available for SYSTEM registry hive.

6. User Data
Displays user and machine name and tree based Start menu for selected USER hive. This explorer is available for USER registry hive.

7. Startup Applications
Enumerates applications that are registered to be run after startup. This explorer is available for SOFTWARE registry hive.

8. Services and Drivers
Enumerates all installed services and drivers with properties. This explorer is available only for NT based system registry SYSTEM hive.

9. Network Configuration
Displays all installed network clients, protocols and services. Enumerates all defined network connections with its TCP/IP configuration. This explorer is available only for NT based system registry SYSTEM hive.

10. Windows Firewall Settings
Displays settings (rules) for Windows Firewall. This explorer is available only for NT based system registry SYSTEM hive.

11. Environment
Displays all environment variables. This explorer is available only for NT based system registry SYSTEM hive.

12. Shell Folders
Displays shell folders (folders known to system). This explorer is available only for NT based system registry SYSTEM hive.

13. Outlook Express
Digs out all Outlook Express accounts and their settings. This explorer is available only for NT based system registry USER hive.

14. Raw Data
This explorer displays whole registry in known tree format. Contains powerful searching and data interpreter.

The license of this software is Freeware, you can free download and free use this registry cleaner software.