The biggest concern when you dispose of your old computer is secure and private important data falling into the wrong hands. Simply deleting files and emptying the trash is not enough. Darik's Boot and Nuke (DBAN) is a popular free software overwrites every sector of your hard drive, making data unrecoverable. It is very safe and discourage people from the hard disk using the forensic analysis to recover the data. Burn the ISO image to disk and boot from it to get the main menu. From there you can choose how you want to erase the disk.
By using advanced methods take a considerable amount of time and if you have some secret government or the secret recipe for KFC in the disk, you can choose a faster method. You can get a list of other methods to the main menu by pressing F3. The quick method to overwrite all sectors with 0 in one pass and it might be the easiest way for home users. However, some of them with the right equipment could retrieve the data from this method and is considered the least secure.
By using advanced methods take a considerable amount of time and if you have some secret government or the secret recipe for KFC in the disk, you can choose a faster method. You can get a list of other methods to the main menu by pressing F3. The quick method to overwrite all sectors with 0 in one pass and it might be the easiest way for home users. However, some of them with the right equipment could retrieve the data from this method and is considered the least secure.
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