Whenever you delete some files from your system, the file is actually not erased from the system, only the index pointing to the file is destroyed, but the file's data can still be recovered.
When you delete a file on your computer, the data in that file can remain on your hard drive for weeks or even months until something else overwrites the space that it occupied.
Even if the file no longer appears in recycle bin, they can still be recovered. This poses a security threat because if anyone else has access to your system, he/she can recover deleted files and the confidential data.
If you want to permanently delete your file, you can use Super Shredder. SuperShredder works by destroying the data inside the file BEFORE it deletes the file from the system - in this way ensuring that someone can't come back at a later date and retrieve sensitive material.
In order to delete a file you can use the program to create a Send-To Menu Association(see above figure).
Then you can simply send the files to be deleted to the SuperShredder Menu and confirm the file deletion.
It is a freeware, and you can click here to download SuperShredder.
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