Windows registry hive viewer
The Windows registry is not one database but several hive files: NTUSER.DAT in the profile, UsrClass.dat beside it, SOFTWARE and SYSTEM in the system folder. The built-in registry editor only ever opens the registry of the running system, which leaves a hive from an old disk, a backup or a disk image with nothing to read it. This tool reads such a file directly, and does something the Windows API cannot do at all: it finds deleted keys. Deleting in the registry flips a cell to "free" and unlinks the record from its parent, but the name, the timestamp and the values stay on disk until the room is reused.
Drop an NTUSER.DAT from a profile, a UsrClass.dat, SOFTWARE, SYSTEM or any other hive file — off an old machine's disk or out of a backup.
Keys on the left, the selected key's values with their types on the right. If the hive is damaged, the tool says exactly what it had to step around.
A .reg file Windows imports by itself, or a CSV of every deleted record that was found.
