A tool called File Shredder can be used to remove files permanently from the hard drive as the ‘Delete’ command in Windows does not remove the file from the hard drive. The Shredder rewrites the deleted files with random series of binary data many times. It is almost impossible to recover the shredded file using any file retrieving software as this process overwrites the file and removes it from hard drive.
There are lot of File Shredders available. After checking most of them, I thought ‘Freeraser’ is the best among them as it is very easy to use. On installing the software, a Recycle Bin icon is displayed on the desktop. Just drag the file in to the Freeraser Recycle Bin and the Shredder will destroy the file or folder forever from your computer. Download Freeraser