部分win7用户在访问Diandian VPN for China时，系统会出现以下错误提示：
出现此问题的原因是缺失了 api-ms-win-crt-runtime-l1-1-0.dll 文件，
请下载下面的文件，解压后安装里面的程序，然后重启计算机即可解决问题。
点击下载：Windows6.1-KB2999226-x64.msu
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