reg.exe

Reg.exe is the command-line utility for interacting with the Windows Registry, a hierarchical database that stores system and application settings. Discussions on WindowsForum.com cover practical uses of reg.exe, including registry hacks for power users who want to tweak visual themes, file handling, and shutdown behavior. Additionally, a known issue is documented where reg.exe does not compress registry keys when saving them to a hive file, as noted in Microsoft KB articles. This tool is essential for advanced Windows administration, scripting, and troubleshooting, allowing direct manipulation of registry entries without the graphical Regedit interface.