"Active@ KillDisk - Hard Drive Eraser is powerful and compact software that allows you to destroy all data on hard and floppy drives completely, excluding any possibility of future recovery of deleted files and folders. It's a hard drive and partition eraser utility."
you want to recover files or just re-use the drive? If the latter, you should be able to partition & format. From the FAQ: http://www.killdisk.com/killdisk-faq.htm
Will I be able to use my HDD after Active@ KillDisk erase operation?
To be able to use HDD again you need to:
* repartition HDD using standard utility like FDISK
* reformat hard drive using standard utility like FORMAT
* reinstall Operating System using bootable CD-ROM or floppy