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Possible Duplicate:
Is there a program to truly delete all deleted files?

I recently moved a bunch of files off my harddrive. How can I zero out the unallocated disk space to make sure all the files I recently moved off the harddrive are unrecoverable?

This is windows-xp on my work computer, so I would prefer not to have to install anything if possible. I am familiar with shred, but I think that only works if you still have the files.

Thanks

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  • @kez: My question is a little different because I don't want to install anything, so the accepted answer on the other post doesn't work for me. If you want to put your Cipher answer here, I would be glad to accept it. (I read every post with "delete" in it before posting... but I missed that post because windows is one of my hidden tags... guess I'll have to learn from that).
    – Jarvin
    Aug 12, 2010 at 21:20
  • If the answer on the dupe solves your problem, you can upvote that.
    – random
    Aug 12, 2010 at 23:02

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You will have to install a 3rd-party app for this.

There are plenty - many are free.

In future you may want to use something like (true crypt dot org) to store sensitive files.

See http://www.techsupportalert.com/best-free-secure-erase-utility.htm

Also check out serase (I think that's what it's called), made by Mark Russinovich. He has an awesome set of tools - search for sysinternals. It might be what you're looking for.

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