The installer has encountered an unexpected error installing this package.

win10安装软件报
The installer has encounteredan unexpected error
installing this package.This may indicate a problem with this package.The error code is 2503.
解决方法： 用管理员权限打开cmd，然后输入命令
msiexec /package C:/Users/asus/Downloads/TortoiseSVN-1.14.1.29085-x64-svn-1.14.1.msi 1 其中msiexec /package 后面接的是你的安装程序的路径，回车运行后成功下载。

The installer has encountered an unexpected error installing this package.最先出现在Python成神之路。