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Possible Duplicate:
How to quickly and effectively wipe a Win7 x64 hard drive

Which tool should I use to wipe free space on Windows 7?

It should be free and preferably open source.

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    I don't think this is a dup, this questions is specifically about deleting the free space.
    – ripper234
    Commented Oct 11, 2013 at 8:26
  • @grawity This question is not a duplicate; this question is specifically about wiping free space. As such, it as an answer that the other question does not: the built-in command line tool cipher /W:C:\ . Cipher can wipe free space on a disk (answering this person's question). Cipher cannot be used to wipe a hard drive (free space, used space, volumes, partition tables, boot sectors at all) making it unsuitable for the linked non-duplicate question.
    – Ian Boyd
    Commented May 27, 2017 at 12:29

1 Answer 1

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Try CCleaner. Go to Options > Settings > Wipe Free Space. It's free, but not open source.

Also, here is a list of utilities that should help accomplish what you want.

Hope that helps.

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  • Good link in the post. I prefer Derrick's Burn and Nuke (DBAN), but as the website says, not for beginners
    – Canadian Luke
    Commented Nov 17, 2011 at 23:13
  • @Luke, Good stuff -- I use that, too. Definitely not for beginners. And I believe it's called Darik's Boot And Nuke.
    – Jeff
    Commented Nov 17, 2011 at 23:19
  • It's some form of Derrick, Derek, Darik or Derrek
    – Canadian Luke
    Commented Nov 17, 2011 at 23:28
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    dban is for full system wiping, not free space wiping, and for that, dban is idiot proof
    – Journeyman Geek ♦
    Commented Nov 17, 2011 at 23:46
  • Yep, dban is for completely (and securely) wiping a drive, not for wiping free space. My bad.
    – Jeff
    Commented Nov 18, 2011 at 10:40

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