Net Framework 4.3 Offline | Installer

When in doubt, install the latest supported .NET Framework for your operating system (currently 4.8.1). It is backward compatible with nearly every application ever written for 4.x.

Now that we have clarified the version, let us focus on the second part of your keyword: net framework 4.3 offline installer

No. .NET Core (now .NET 5/6/7/8/9) is a cross-platform rewrite. .NET Core 3.1 existed, but never 4.3. Do not confuse the two. When in doubt, install the latest supported

Let us walk through the process assuming you have identified that your application requires .NET Framework 4.7.2 (a very stable, widely used version). When in doubt