Download the CD version. Open your CD burning software and look for an option specifically for burning .iso files. There should be one. Use that to burn the .iso file to a disk.

Put the disk in your computer, reboot, and the computer will hopefully boot from the disk. Then select the drives you wish to erase. Choose the pseudorandom erasure method and use 2-3 rounds. If you're trying to hide your data from the FBI or the NSA, use 15-30 rounds. This will take a while as your computer is generating cryptographically random data and repeatedly overwriting your hard drive with it.

Post edited at 9:38 am on June 25, 2008 by shadowpool

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http://dban.sourceforge.net/

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The reason that this is preferable to a reformat, as you may gather from shadowpool's response, is that this tool overwrites your hdd's data with a bunch of cryptic stuff.  Reformatting actually leaves all of your data on there!

Post edited at 9:43 am on June 25, 2008 by matto

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