Kernel File Shredder is a Refined Windows 7 File Shredder Tool that shreds files and folders of the hard drive, files of the recycle bin, system files like temporary internet files, cookies and Windows temporary file, free disk space, and useless files. After shredding, you can be sure that nobody will retrieve them even with advanced Windows data recovery tools. Therefore, it is a good practice to use it before selling or abandoning computers.