Erase hard drive by Active@ KillDisk - powerful and compact software for Windows and DOS that allows you to destroy all data on hard disks, USB drives and floppy disks completely, excluding any possibility of future recovery of deleted files and folders. Supports larger than 128GB hard disks via using LBA(LBA48) mode to access drive's data, SSD, IDE, SATA and SCSI drives. The hard drive and partition eraser utility has a free killdisk version.
http://www.killdisk.com/