Net Framework 4.7 2 Windows 7 Certificate Chain Error

Beyond the installation phase, the error persisted in runtime scenarios due to changes in the .NET Framework's handling of SSL/TLS protocols. .NET 4.7.2 defaults to using the operating system's security protocols. While Windows 7 supports TLS 1.2, it is often not enabled by default in the registry. As the internet migrated toward TLS 1.2 and 1.3 as mandatory standards for secure communication, .NET applications running on Windows 7 began to fail when attempting to communicate with secure endpoints. If the application tried to handshake using an older, deprecated protocol, or if the certificate chain relied on a root CA that had been rotated or cross-signed using modern algorithms not present in the Windows 7 registry, the application would throw a "Remote certificate is invalid" exception.

. This is critical; do not let Windows choose the store automatically.

Windows 7 requires specific updates to recognize modern SHA-2 signed installers. : Adds SHA-2 code signing support. KB4490628 : Servicing stack update required for SHA-2.

In the or installation log, you might see: