Unlock software corrupted on My Book Essential so I cant unlock or see drive!

Thanks for the help, its much appreciated. Unfortunatly it didnt work. I couldnt find the essential driver but searched for every WD driver or software and uninstalled it. Same things happens, plug it in and windows says installing device driver, I can hear the drive scaning, says its installed the driver and all I can see is a CD drive in my computer. That CD drive should load the password unlock program. It does this on every PC its pluged into.