A necessity if youre selling, donating or reassigning your PC Simply deleting files, pictures, or documents - even reformatting the hard drive - isnt enough. Anyone with basic computer knowledge can recover and steal the private information you thought was gone. U.S. Department of Defense standards for secure data deletion require 7 overwrites of the target drive space. Lets you overwrite up to 100 times, so even the most sophisticated recovery and forensic methods cant recover your data. also lets you wipe only free drive space, keeping the operating system intact. Use it to keep personal information out of the wrong hands, or even to clean up after a stubborn virus or spyware attack.