Freeeraser

Freeraser is a file shredder software for securely deleting sensitive data from your hard drives. Freeraser is a portable app and you can run it from your USB stick

Once you install it to your removable media it shows up as a trashcan icon on your desktop. you can drag and drop files to freeraser. The dropped files are destroyed completely. Right clicking on the icon will show the options, there are three modes of deletion are available. Fast will overwrite the file location on the disk with random data, forced will do three rounds of filling according to DoD standard, and ultimate destruction will do 35 rounds of filling with data according to Guttman algorithm. The ultimate round will take some time for deletion based on the data you want to delete.

Freeraser is a freeware for windows and works with XP/Vista.