I am trying to upgrade my Mobo and CPU and Memmory on my system with out formating can someone confirm or tell me if the directory in the registry that i need to delete is this one HKEY_LOCAL_MACHINE/SYSTEM/CurrentControlSet/ENUM i want to delete all my devises so that when i install the new components win XP will reinstall all my parts, basically its a new install of components without reinstalling XP or formating my harddrive. thanks to anyone that knows