permanent file deletion

25 Free File Shredder software deletes security data for computers
the role of file shredder software is to use some algorithms to permanently delete data and make them completely unrecoverable.
The best Portable PC applications of all time (Part 4)
portable application is a shortened version of the software, can run without installation on the server and does not change computer configuration information. in other words, you can run it, use it and no one will know you used it.