Evidence Eliminator is a computer software program that runs on Microsoft Windows operating systems at least through Windows 7. The program deletes hidden information from the user's hard drive that normal procedures may fail to delete. Such "cleaner" or "eraser" programs typically overwrite previously allocated disk space, in order to make it more difficult to salvage deleted information. In the absence of such overwrite procedures, information that a user thinks has been deleted may actually remain on the hard drive until that physical space is claimed for another use (i.e. to store another file). When it was offered for sale, the program cost between $20 early on to $150 later.