HDShredder free edition is the ideal tool for erasing entire hard disks and other media.
HDShredder works independent of partition layout, file system, and operating system. It also works with proprietary formats which otherwise would be unaccessible.
The Free Edition is real freeware without obligation to buy and is intended for the short-term usage at no cost. Afterwards, these media can be sold or dumped without any risk that former data can be restored, even not with recovery software.
Compatible with: Win 2000/XP/2003/Vista. Download 8,6 Mbytes.
Link: download freeware to erasing hard disk.