Data Destroyer

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Windows Software to Wipe Files and Folders

Data Destroyer is a program for permanently deleting files and folders, and can be used for secure deletion of all files on a disk (but it cannot be used to wipe an entire hard drive, including free space). To securely delete (that is, to "purge" or "wipe") a file (on a disk or on any writeable magnetic medium such as a flash drive or a memory stick) means to delete the file by overwriting the data in the file many times (before removing it from the file system) so that the data which was in the file cannot be recovered by any means.
  Data Destroyer screenshot