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:
Download the .msu file corresponding to your Windows 10 build (e.g., KB4565511 for Windows 10 2004). But note: these are updates, not full installers. Windows Installer 5.0 Download For Windows 10 64-bit
Instead of searching for a non-existent download, follow these proven troubleshooting steps: For very specific version requirements (e
Open Command Prompt as Administrator and run: Download the
msiexec /?
The top line will show the version. If it is 5.0.xxxxx, your system is fine.
Before searching for any download, verify which version of Windows Installer is running on your 64-bit Windows 10 system. Here is the simplest method: