Erase files securely and completely forever on any physical drive, with DeleteOnClick

DeleteOnClick is a free program that deletes files completely in one click. Once a file is ‘Securely Deleted’ no one can undelete it.

Features: Any file can be securely deleted, except files that are being used by other programs. * Follows the U.S. DOD 5220.22-M secure file deletion standard. * Completely deletes files in one click. * Files deleted using DeleteOnClick are permanently erased and can never be recovered. * Deletes files on any physical drive visible by Windows. * A Confirmation warning allows the users to change their mind before deletion. * Delete progress shown.

A commercial (pro) version will rename your files before deletion using random names,  so that anyone trying to undelete them will not be able to see even the original names.

* Check also this free Shredder Desktop Gadget.