Look for the best disk wipe software for Windows

Honestly, Windows doesn’t include a dedicated third-party-style "disk wipe" app, but its built-in cipher.exe tool and Format function can get the job done securely for most people.

For a full drive wipe, your best built-in method is to use the Command Prompt. Type cipher /w:C: (replace C: with your target drive letter) – this will overwrite all free space with random data, making deleted files unrecoverable. It's not a full drive erase, but it's the closest you'll get for free space without extra software.

For a more thorough, irreversible erase, your only true built-in option is to use the "Format" right-click option in File Explorer, but make sure to uncheck "Quick Format" so it performs a full overwrite. It's not as fancy as third-party tools, but it gets the job done.