RegDelNull is a command-line tool that helps you searche 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.
Usage: regdelnull [-s]
-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 -s
RegDelNull v1.10 - Delete Registry keys with embedded Nulls
Copyright (C) 2005-2006 Mark Russinovich
Sysinternals - www.sysinternals.comNull-embedded key (Nulls are replaced by '*'):HKLMSOFTWARESystems InternalsCan't touch me!*Delete? (y/n) y
Scan complete.