How can I completely erase all data from a hard drive?

Waseem December 21, 2011

I have an old PC that I want to sell. But first, I want to delete all the data from the hard drive. I don’t want to just format because I heard old data can still be recovered. I want to completely erase everything. What can I use to do this?

  1. Bob Maria
    June 6, 2012 at 6:36 am

    Kernel File Shredder is one of the efficient tool to securely erase all the contents of har disk making it impossible to recover. The more info about software can be found here :

  2. Ray
    December 22, 2011 at 2:19 am

    I have used a freeware program called Eraser.  But that does not get rid of operating system unless the disk is mounted non-system...  It goes as far as a 35 pass Gutmann algorithm (but you might wait a week for that)...

    • Jeff Fabish
      December 22, 2011 at 3:17 am

      A recent study revealed that a single null-byte pass is good enough, anything else is simply overkill. 

  3. Anonymous
    December 21, 2011 at 8:49 am

    Insert your windows cd boot on it, choose the old hard drive and ask format.

  4. Jay
    December 21, 2011 at 8:19 am

    you need dban or a shredder that deletes data and prevents data recovery.
    Article on shredders by makeuseof :


    oops, did not realize dban was already suggested under the scroll bar. please sort the comments, as they were if possible

    December 21, 2011 at 8:18 am

    Hello, one of the better ones, is the following:

    There are other options:

    Active Kill disk:

  6. Jeff Fabish
    December 21, 2011 at 8:12 am


    Good idea. DBAN (Darik's Boot And Nuke) is my favourite utility. It takes a considerable amount of time to finish, but is well worth every second. Just burn that sucker to a disk and begin the wipe. CCleaner also has a nifty file shredder as well, which doesn't require your to burn a disk. 

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    - Jeff

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