If there's one downside, Cipher is very slow. It is also the easiest and fastest command to wipe all deleted files securely. It will not touch any other files on your drive, so it's safe. This command will only securely wipe all free space that has deleted files.
You can securely delete all free space on your hard drive by typing in cipher /w:C.
Press the Windows Key + S and begin typing PowerShell, then right-click on Windows PowerShell and Run as Administrator.
We can accomplish this using Cipher with Windows PowerShell because while Cipher does not have a graphical user interface, it is still easy for anyone to use. TIP: Hard to fix Windows Problems? Repair/Restore Missing Windows OS Files Damaged by Malware with a few clicks
