pull the harddrive out and at the back of the harddrive (where u plug everything in) theres a dip switch where u control the harddrive to be either a master or slave take that tiny chip out and put it in so its set to slave. then take that harddrive and plug it to another pc . NOTE: u should hav the harddrive ur about the format as the second harddrive inthe other PC this means DONT pull the exsisting harddrive out in the computer.
Now the computer should hav 2 harddrives in it. Now boot the PC andpress Del or F1 or watever it is to get to the main windows set up. right where its says Secondary Slave set it to auto instead of none , then quit and save... know ur ready to format .