By deleting files/folders/drives with this program you can switch between 8 different erasing methods, and all of them overwrite your old file and rename it before removing so the only thing that could ever be recovered with an undeleting tool will be senseless data. As a special feature you can overwrite files you want to delete with another file too, so whenever someone tries to reverse the wiping, he only gets the things you want him recover.
Free download