Windows Installer 5.0 (MSI 5.0) introduced several advanced capabilities focused on security and modern hardware support:
To reiterate: —because you don’t need one. Windows 10 includes Windows Installer 5.0 (or a superior version) by default and keeps it updated via Windows Update. If you are experiencing installation errors, the cause is almost certainly a corrupted service, a misconfigured registry, or a badly authored MSI package—not a missing installer version. Windows Installer 5.0 Download For Windows 10 64-bit