Unlike the Web Installer, this "Full" or "Redist" package requires a two-step process:

Before you launch that vintage game, confirm these boxes are checked:

By adding this feature to the DirectX End-User Runtimes distribution, Microsoft (or a third-party redistributor) would:

The is a vital collection of legacy libraries that remain essential for running older Windows games and multimedia applications on modern operating systems. While newer versions like DirectX 12 come pre-installed with Windows, they do not always include specific "side-by-side" components from the decade-old June 2010 update that many classic titles require to function. Why the June 2010 Version is Unique

Because this is a legacy file, it is important to download it from a safe source to avoid malware masquerading as a system utility.