https://blog.wongcw.com/2020/08/04/kms-tools-portable-v20200801-%e5%b0%88%e6%a5%ad%e7%a5%9e%e9%be%8d%e6%bf%80%e6%b4%bb%e5%b7%a5%e5%85%b7%e5%96%ae%e6%96%87%e4%bb%b6%e7%89%88/