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I am looking for commands or methods whereby I can just write all zeros to the free space on a Pen drive on Windows OS. The existing files should not be affected.

There's a built in command called 'cipher' but it runs in 3 passes, first 0's then 1's and then random. So it defeats my purpose.

There might be Linux solutions using 'dd' but I am not much comfortable with Linux and would prefer a way on Windows.

There is a third party tool called CCleaner but it's not very clear if its Wipe mode writes all 0's or random data in its single pass.

Any further help would be great. I am using Windows 7 Ultimate 64 bit.

Hashim Aziz
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rajeev
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1 Answers1

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In the Microsoft Windows Family of Operating Systems, we can use "Symantec"'s (formerly NORTON_Peter's) "Norton Utilities" Suite of Software Optimizers. One of its functions is called as "Bleach Free Disk Space".

The "_Bleach Free Disk Space_" Function