安装失败后，您必须修复2015 vc可再发行文件并重新启动Visual Studio安装程序.

After the failed install you have to repair the 2015 vc redistributables and restart the visual studio installer.

可重新分发的安装程序被弄乱了，它混合了64位和32位dll.您可以通过查看vcruntime140.dll文件大小来检查是否有此问题.在Windows文件夹中搜索vcruntime140，您应该看到4个文件(发行和调试版本均为64和32位).如果任何文件的大小相同，则需要对可再发行文件进行修复.

The redistributable installer is messed up, it mixes up 64bit and 32bit dll's. You can check if you have this problem by looking at the vcruntime140.dll file size. Search your windows folder for vcruntime140 you should see 4 files (64 and 32 bit in both release & debug versions). If any files have the same size, you need to run a repair on the redistributable.

在我的系统上，32位dll是83,3KB，64位是86,6KB(发行版).

On my system the 32-bit dll is 83,3KB, the 64 bit is 86,6KB (release versions).