The latest available version includes the MFC Security Update which fixes a critical DLL planting vulnerability. Why You Need to Download It
It provides the standard libraries for C Runtime (CRT), Standard C++, ATL, MFC, OpenMP, and MSDIA. microsoft(r) visual c++ 2010 runtime (x86) download
This specific version is for 32-bit applications. Even if you have a 64-bit Windows PC, you still need this x86 version to run 32-bit software. The latest available version includes the MFC Security