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This command-line utility searches for and allows you to delete Registry keys that contain embedded-null characters and that are otherwise undeleteable using standard Registry-editing tools. Note: deleting Registry keys may cause the applications they are associated with to fail.

Using RegDelNull
Usage: regdelnull [-s]

Parameter Description
-s Recurse into subkeys.

Here's an example of RegDelNull when used on a system on which the RegHide sample program has created a null-embedded key:

C:>regdelnull hklm -sRegDelNull v1.11 - Delete Registry keys with embedded Nulls

Copyright (C) 2005-2006 Mark Russinovich
Sysinternals - www.sysinternals.com
Null-embedded key (Nulls are replaced by '*'):
HKLMSOFTWARESystems InternalsCan't touch me!*
Delete (y/n) y
Scan complete.