How to Use the Cipher Security Tool to Overwrite Deleted Data
Note The cipher /w command does not work for files that are smaller than 1 KB. Therefore, make sure that you check the file size to confirm whether is smaller than 1 KB. This issue is scheduled to be fixed in longhorn.
To overwrite deleted data on a volume by using Cipher.exe, use the /w switch with the cipher command:
- Quit all programs.
- Click Start, click Run, type cmd, and then press ENTER.
- Type cipher /w:folder, and then press ENTER, where folder is any folder in the volume that you want to clean. For example, the cipher /w:c:\test command causes all deallocated space on drive C to be overwritten. If C:\folder is a Mount Point or points to a folder on another volume, all deallocated space on that volume will be cleaned.
But full windows since vista does work as well.