The Microsoft .NET Framework 4 (Standalone Installer) is the most reliable choice for Windows 7. It includes all necessary files for both 32-bit (x86) and 64-bit systems.

Microsoft still hosts the original redistributable package. This is the full, standalone installer that does not require an internet connection during setup.

To confirm that v4.0.30319 is correctly installed on your 32-bit system:

You might have mistakenly downloaded an ARM or Itanium version. Fix: Ensure you downloaded dotNetFx40_Full_x86_x64.exe . Do not use Windows 8/10 specific packages.

If you already have a newer version (like 4.7.2), the system will still report the CLR version as 4.0.30319 , as the major CLR version did not change for many subsequent updates .