This might be not so useful but, you do not need a license to use Windows 10 fully. When you format your hard drive, you can reinstall Windows 10 with a media creation tool and just choose not to register a license to it. The only things that will really be restricted on a free copy of Windows 10 are cosmetics and even you can find work arounds for that. There are hard drive repair companies but those could cost you a lot and you'd rather buy a new windows license.