原贴：http://blog.csdn.net/gangeqian2/article/details/79307416
在安装Python3.6后，发现提示api-ms-win-crt-process-l1-1-0.dll丢失，网上搜索后发现很多人都出现了 api-ms-win-crt**.dll缺失的问题，导致一些软件或游戏无法正常运行。总结如下：
Windows 通用 C 运行库（Universal C Runtime）是通过Windows Update更新安装到系统的，更新的编号为KB2999226（10.0.10240.16390）或KB3118401（10.0.10586.9），组件如下：
api-ms-win-core-file-l1-2-0.dll
api-ms-win-core-file-l2-1-0.dll
api-ms-win-core-localization-l1-2-0.dll
api-ms-win-core-processthreads-l1-1-1.dll
api-ms-win-core-synch-l1-2-0.dll
api-ms-win-core-timezone-l1-1-0.dll
api-ms-win-core-xstate-l2-1-0.dll
api-ms-win-crt-conio-l1-1-0.dll
api-ms-win-crt-convert-l1-1-0.dll
api-ms-win-crt-environment-l1-1-0.dll
api-ms-win-crt-filesystem-l1-1-0.dll
api-ms-win-crt-heap-l1-1-0.dll
api-ms-win-crt-locale-l1-1-0.dll
api-ms-win-crt-math-l1-1-0.dll
api-ms-win-crt-multibyte-l1-1-0.dll
api-ms-win-crt-private-l1-1-0.dll
api-ms-win-crt-process-l1-1-0.dll
api-ms-win-crt-runtime-l1-1-0.dll
api-ms-win-crt-stdio-l1-1-0.dll
api-ms-win-crt-string-l1-1-0.dll
api-ms-win-crt-time-l1-1-0.dll
api-ms-win-crt-utility-l1-1-0.dll
api-ms-win-eventing-provider-l1-1-0.dll（KB3118401不含此文件）
ucrtbase.dll
在C:\window\system\ 或者C:\window\SysWOW64\ 里找不到相应的.dll文件。网上有一些 单个.dll文件的下载，但是尝试后均无效。正确的做法是micorsoft 官网下载相应更新，再安装。重启后OK：
KB2999226、KB3118401更新下载：
KB2999226 微软下载链接 https://support.microsoft.com/en-us/help/2999226/update-for-universal-c-runtime-in-windows
KB3118401 微软下载链接 https://support.microsoft.com/en-us/help/3118401/update-for-universal-c-runtime-in-windows