 This is the easiest way to re-format Windows 11. No other hardware or software required. Go to settings, then system, then recovery. Select reset, then remove everything. So this is a full wipe, back up your files before you do this. You can ask Windows not to overwrite your files but I don't trust Windows. Then local reinstall. If on a laptop, you'll need to plug it in at this point. Reset and the computer will do its thing. Don't panic if it restarts during the process. And now your Windows is fresh again.