Learn how to remove or delete undeletable or large files, folders & subfolders quickly & permanently using the Command Prompt in Windows 11/10.

Format or delete C drive with using Command Prompt (CMD). This allows you to remove all data and reinstall Windows 11/10.

From the command line, type "backup.bat" and the batch file will run your specified commands: first, copying all files from that directory, then renaming them to remove the extensions.

Windows says your file is in use because it's open in another program? Learn how to force rename, delete, or move the file.

Meeting DoD standards for securely deleting files in Windows 11 requires the use of a special application. Fortunately, Microsoft provides one for free in Sysinternals.