Securely overwrite files that have already been deleted

Deleted files can be securely overwritten as follows to prevent them from being restored:

• Enter Win+R to start the Run dialogue
• Enter cmd and press ENTER
• The command prompt appears
• To securely delete files on the C: drive, the command must be entered as follows:

cipher /W:C:\

The programme takes quite a long time to run, but it is thorough. Running the programme once is enough to securely delete files.