Erase all traces of your hard disk with Darik's Boot and Nuke

The Darik's Boot and Nuke is a boot disk that allows the user to clean / delete the security of all data on the hard drive. With DBAN can erase ALL data on a hard drive in safety, that you may be missed if you wish to sell your hard drive, or erase any trace of any activity previously written to disk in question.

The Darik's Boot and Nuke clean as complete a hard disk that it will not give some results when inspected by "forensic detectives.
Begin to use DBAN in order to completely wipe your hard drive.

1. Download the DBAN ISO and burn it to a CD. If you're having trouble burning the ISO to CD follow this tutorial.

2. After recording the CD, try to give priority to boot from the CD.

3. Insert the CD, and boot the computer.

4. You are now ready to completely erase your hard, think twice. To continue and wipe the disc 100% autonuke type and press Enter.

5. The DBAN starts.

6. The DBAN is to delete all the data available on disk, the time delay of this operation depends on the size and speed of the disc.

7. When DBAN finished his service will be shown a message saying "DBAN Succeeded". And his album is ready for another!

Links:
dban.org - Darik's Boot and Nuke | Hard Drive Disk Wipe