Prevent Restore is an easy to use program for Windows XP and Vista that removes already deleted files and folders from your PC or removable devices.
It uses several security algorithms such as DoD 5220.22, Gutmann (most of them are available with paid version, free version only allows spaces to overwrite the deleted files) to make anti-recovery process the most effective.
Its easy interface allows all in a few steps. After installing the program, select a disk on which you want to run anti-recovery operation and click next.
This tool can run on any hard disks and almost any removable storage (like USB disks) where you have deleted some sensitive data so nobody will be able to restore it. Download Prevent Restore