To reach build 4.0.3019 , you need (Update for .NET Framework 4.0).
Below is a guide on how to safely download, install, and fix common errors associated with .NET Framework 4.0.30319. Download Net Framework 4.0.3019 For Windows 7 64 11 Fix
After installing the above, run on Windows 7. You will receive updates that change the build number. None will exactly show 4.0.3019, but your system will have all fixes from that era. To reach build 4
If you specifically need version 4.0 for a legacy application, you should use the official Microsoft installers: Web Installer Microsoft .NET Framework 4 (Web Installer) To reach build 4.0.3019
The "Web Installer" frequently hangs. Downloading the full 48MB–60MB offline package is the most reliable path. The Windows 11 Perspective