TweakNow SecureDelete A program for completely and irretrievably removing files from your hard drive. SecureDelete uses the two most common removal methods: the Gutman method and DOD 5220.22M. Both of these methods delete files without leaving a chance to recover them. Also, the program can delete files and overwrite the area where the deleted files were stored several times with random characters. This method is not as reliable as the first two, but it is still more reliable than the standard deletion method and faster.