How to Permanently Delete Files From Disk

Almost every file you delete from hard disk is recoverable. Even formatted disks can be un-formatted and data recovered.

If you care about the secrecy of the deleted files, make sure to permanently delete them. For example, you might want to permanently delete confidential files, settings and browsing history cache when selling your laptop PC to someone else.

Simply erasing files won't work, since they can be easily recovered. What you need to do is to install a specialized disk cleanup tool, such as File Shredder or similar, that would irrecoverably delete files and wipe the free disk space so that no one can recover your files.  

Once you instlal File Shredder, you can either "wipe out" the blank disk space to permanently erase any traces of previously deleted files and folders or you can open select any single file and destroy it.

Wiping the whole disk can take some time, so be patient.