SafeDeleter is a secure data removal tool for Windows. It completely removes sensitive data from your hard drive by overwriting it several times with military strength selected patterns.
With SafeDeleter you can remove files from your hard drive without fear they could be recovered. There are quite a few software tools today for retrieval of deleted files under Windows OS. Those tools, often referred to as "file recovery" software, are taking advantage of shortcoming of Windows "delete" command that we all use regularly to delete files. Actually, the "delete" operation in Windows only removes bits of information from files so they appear deleted in OS. It is easy to retrieve those files using specialized file recovery software.

In order to remove, or shred files permanently from your system you have to use a program that is capable of rewriting the files with random series of binary data multiple times. This process is often called safe deletion. That way, the actual content of the file has been overwritten and the possibilities to recover such a deleted file are mostly theoretical.