If you want to delete files from the hard disk permanently, you could use a program of the features of MRT Files Eraser, light and practical, and also free. MRT Files Eraser allows you to rewrite a code on the part of the hard drive where the file in question was stored, which prevents that file from being recovered under any circumstances.
This is undoubtedly the best option to not take risks when we want to get rid of certain information. MRT Files Eraser works from a single window (black background with dark brown top), very intuitive. Just select the file and then delete it.
You can free download MRT Files Eraser 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.