Since you cannot download a separate file, you must use official system tools to ensure your installer is current and functioning correctly. Option A: Use Windows Update
Install any available "Cumulative Updates," as these contain the latest fixes for system components like msiexec.exe . Option B: Use the Microsoft Update Catalog Install Windows Updates - Microsoft Support windows installer 50 download for windows 10 64bit new
Microsoft does not offer a standalone installer for version 5.0. Since you cannot download a separate file, you