Deleting data can be so easy for example in windows to delete any file just right click then delete, But this is not really delete the file but it send it to the “Recycle bin” and recycle bin can be like a place where all deleted files go but this Is not safe because any one can explorer this files and you can empty the recycle bin but it is not safe too because it doesn’t really delete it but it is just unlisted so can easily any one use a recovery tool to restore the deleted data, So you need a way or a program to secure delete your data.
There are a lot of utilities and programs that make this job done for you easy and fast and I will list it for you.
This utility come for you from Microsoft and we can say that it is The only way to ensure that deleted files, as well as files that you encrypt with EFS, are safe from recovery is to use a secure delete application. Secure delete applications overwrite a deleted file’s on-disk data using techiques that are shown to make disk data unrecoverable, even using recovery technology that can read patterns in magnetic media that reveal weakly deleted files. SDelete (Secure Delete) is such an application. You can use SDelete both to securely delete existing files, as well as to securely erase any file data that exists in the unallocated portions of a disk (including files that you have already deleted or encrypted). SDelete implements the Department of Defense clearing and sanitizing standard DOD 5220.22-M, to give you confidence that once deleted with SDelete, your file data is gone forever. Note that SDeletesecurely deletes file data, but not file names located in free disk space.
But the bad side that it is hard to use for the normal user.
You can download it: http://technet.microsoft.com/en-us/sysinternals/bb897443.aspx
If you need a graphic interface inferno will be very good for you and will finish the work perfectly unfortunately it has bad side too it you should download and install VB 6.0 runtime in order to run fine and it doesn’t compatible with windows 7
You can download it: http://inferno.sourceforge.net/
and to download VB 6.0 runtime: http://www.microsoft.com/Downloads/details.aspx?FamilyID=bf9a24f9-b5c5-48f4-8edd-cdf2d29a79d5&displaylang=en
I left the best one to the end it is the best program that I used to secure delete data, it is easy to use have a nice and simple user interface and free, it will be added to your right click menu so you can easily secure delete any file easily and fast I highly recommend you to use it to make sure that you secure delete your data specially if it is an important data like account bank password or else.
You can download it: http://eraser.heidi.ie/index.php#download