Many 4.0 installers fail because Windows 7 doesn't recognize modern security certificates. Use the Offline Installer:

: You might see a UAC prompt; click "Yes" to allow the app to make changes.

On Windows 7, .NET Framework 4.0 is not included by default and must be installed manually.

Windows 11 comes with .NET Framework 4.8 pre-installed and supports later versions. However, older .NET Framework versions (1.0–4.0) are not officially supported on Windows 11. But there is a workaround:

Corrupt Windows Installer or pending updates.

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