By overwriting the portion on the hard drive that was previously allocated to the files several times with junk data, CHAOS Shredder will completely erase files from your disk, without the possibility to recover it by any practical software or hardware methods.

Master Shredder is a professional files wiping utility. Files deleted by this software cannot be recovered by any third party software, even by special hardware devices (analyzing remanent magnetization of hard drive's surface).
Master Shredder can securely delete your important files using 18 wiping algorithms, including U.S. DoD 5200.28, NATO Data Destruction Standard, U.S. Air Force Standard, U.S. Army Standard, Russian GOST P50739-95 Data Destruction Standard and others.
It destructs files not only on FAT16 and FAT32 formatted hard drives and other media, but it includes special algorithms for NTFS formatted hard drives, it recognized and destructs NTFS compressed and encrypted files.
Integrated with Windows: it is possible to shred files from Explorer Context Menu, by drag-n-droppi... [mehr Infos in den Details]

Die Free Edition von HDShredder ist das ideale Werkzeug zum Löschen ganzer Festplatten oder anderer Speichermedien. HDShredder arbeitet unabhängig von Partitionslayout, Dateisystem und Betriebssystem und kommt auch mit ansonsten nicht zugreifbaren proprietären Formaten zurecht. Die Kaufversionen HDShredder Basic Edition, HDShredder Standard Edition, HDShredder Professional Edition bieten erweiterte Fähigkeiten.