. Oh yeah Im using Windows Vista Home Edition.
that is not important as you will write to zeros with software on a bootdisk and not from within vista , what is brand name of harddrive as most have tools/utilities for this like maxtor/seagate has maxblast 5
http://www.seagate.com/ww/v/index.jsp?locale=en-US&name=MaxBlast_5&vgnextoid=7add8b9c4a8ff010VgnVCM100000dd04090aRCRD