Windows 11 includes newer versions of .NET (like 4.8 or 4.8.1) by default, which are backward compatible with version 4.0. If an app requests "v4.0.30319" and fails, the framework is likely corrupted or disabled.
Why this works: The VM isolates version conflicts. Your host OS (Windows 11) keeps .NET 4.8, while the guest OS (Windows 7) runs .3019 natively. Download Net Framework 4.0.3019 For Windows 7 64 11 Fix