https://www.microsoft.com/en-us/software-download/windows10
https://www.howtogeek.com/186775/how-to-download-windows-7-8-and-8.1-installation-media-legally/
https://www.heidoc.net/joomla/technology-science/microsoft/67-microsoft-windows-iso-download-tool
还有，试试下面这个Magical Jelly Bean KeyFinder，也许有用
https://www.magicaljellybean.com/keyfinder/
