There is no official .exe or .msi file from Microsoft to "install" version 5.0 on an existing Windows 10 machine.
The core MSI version is identical (5.0), but Windows 10 includes additional security patches and servicing stack improvements. Feature-wise, Windows 10’s version is superior. Windows Installer 5.0 Download For Windows 10 64-bit
If you are experiencing installation errors, you should attempt to repair the existing system components rather than trying to "reinstall" the installer engine. There is no official
Are you having a (like Error 1601 or 1719) when trying to install a program? I can help you troubleshoot the exact issue. What's New in Windows Installer 5.0 - Win32 apps If you are experiencing installation errors, you should
Click , type cmd , right-click it, and select Run as Administrator . Type msiexec /unreg and press Enter . Type msiexec /regserver and press Enter . 2. Run the Windows Installer Troubleshooter