10 64-bit Hot! — Windows Installer 5.0 Download For Windows

to scan for and repair corrupted system files related to the installer. Windows Troubleshooter Update & Security Troubleshoot

For very specific version requirements (e.g., a build server needing an older 5.0 patch), you can search the Microsoft Update Catalog for terms like: Windows Installer 5.0 Download For Windows 10 64-bit