Microsoft's architecture for the .NET Framework 4.x family only allows for a single 4.x version to be present on a system at one time.

Since Windows Server 2016 includes version 4.6.2 by default, the installer for the older 4.5 version will be blocked.

.NET Framework 4.5, 4.5.1, and 4.5.2 have reached End of Life (EOL) and no longer receive security updates. How to Check and Manage .NET Versions on Server 2016

Because .NET Framework 4.x versions are , any application designed to run on .NET Framework 4.5 will run automatically on the version already included with your server. Why You Can't Install .NET 4.5 on Server 2016

To confirm which 4.x version is currently active, you can check the Windows Registry: Download .NET Framework 4.5.2

While you cannot directly download and install .NET Framework 4.5 on , you do not need to. Windows Server 2016 comes with .NET Framework 4.6.2 preinstalled as a native component.

If you need to verify your installation or ensure specific features (like ASP.NET) are active, follow these steps: 1. Verify Installed Version via Registry