部分Win7用户在访问Mango VPN for China时，可能会遇到如下错误提示：
这是由于系统中缺少api-ms-win-crt-runtime-l1-1-0.dll文件所引起的。请下载以下文件，解压后安装对应的程序，然后重启计算机即可：
点击下载：Windows6.1-KB2999226-x64.msu
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