The corresponds to Visual Studio 2013. It provides the runtime components required to run C++ applications built using that specific version of the development environment.
Without the x86 version, a 32-bit application compiled with VS 2013 would crash instantly with a “missing DLL” error. The x64 redistributable, while also available for the same VS 2013 generation, serves a different universe of 64-bit applications. They are not interchangeable.
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