Windows Registry

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The Windows Registry is a unnecessarily nested key-value store.

Windows for Workgroups 3.11

The following things were noticed after installing the 16-bit version of Internet Explorer 5.01.

REGEDIT.EXE

This one is bundled with the operating system. Run it with the /v flag to make it actually usable.

  • It only sees the type registrations (HKEY_CLASSES_ROOT in REGEDT16.EXE).
  • Spaces in keys are replaced with #.
  • There is only one value per key ((Default) in REGEDT16.EXE), and it is always a string.
  • A "Revert to Last Save" menu item exists.
  • Data is stored in %WINDIR%\REG.DAT.[1]
  • Separate REGEDIT.HLP and REGEDITV.HLP files exist. The latter is used for the Help menu when running in verbose mode.

REGEDT16.EXE

This one comes with the 16-bit version of Internet Explorer 5.01.

  • The About dialog states this is for both Windows 3.1 and Windows NT 3.51.
  • HKEY_CURRENT_USER and HKEY_LOCAL_MACHINE are present too.
  • String, Binary, and DWORD are the only types.
  • Data is stored in %WINDIR%\REG16X2.DAT.[2]
  • REG16X2.Enn for 00-99 are created next to the file for each installation and uninstallation attempt.

KB articles

References