There is no official .exe or .msi file from Microsoft to "install" version 5.0 on an existing Windows 10 machine.
If a specific software tells you that you need Windows Installer 5.0, you can verify your version in seconds: Press Windows Key + R to open the dialog. Type msiexec and press Enter . Windows Installer 5.0 Download For Windows 10 64-bit
A window will pop up showing your current version (e.g., ). How to "Update" or Repair Windows Installer There is no official
Go to Settings > Update & Security > Windows Update and click Check for updates . This ensures you have the latest stable build of the installer service. A window will pop up showing your current version (e
Microsoft changed its distribution model starting with Windows 7. Because Windows Installer (MSI) is deeply integrated into the system's core, it is no longer released as a "redistributable" package.