i have to agree with Hydro, you will likely be suprized at the number of duplicates, i do the safe mode clean out as regular maintenance, my hard drive controller has been listed 8 times once. scrub them all and reboot - you likely have 2 versions , a standard and a name brand like matsushita etc, competeing.
caveat - youmust remove the "root" of a device last ie the hd channels (master - slave) then the controllew controller. [sig][/sig]