RegASSASSIN is a portable utility that can remove stubborn registry keys by resetting the key's permissions and then deleting it.

Simply download RegASSASSIN from the link below, unzip the file, and run RegASSASSIN.exe. Next, enter a registry key and choose the options you would like. Finally select delete to to execute the options.

Compatible with Windows 2000, NT, XP, Vista
(Vista users must run program as administrator).