Please read this disclaimer!

Even when files are deleted it may still be possible to find that data on the computer. Removing all personal data from a computer that has been discontinued, donated, or trashed is a concern for people everywhere. this video shows you how to delete the data on your hard drive forever. The only way more permanent than this is to remove the data storage device (Hard Drive) and destroy it.

This will remove all data from the computer when performed properly. This includes but is not limited to the operating system, photos, emails, pictures, music, and various other files. All data on the hard drive is written over and will not be able to be recovered. I am not responsible for the loss of data.

If you decide to follow the actions of this video, you accept all liability for your actions.

The software mentioned is freely available from…
http://www.ultimatebootcd.com/
http://www.dban.org/