Net Framework 4.7 2 Windows 7 Certificate Chain Error ((new)) 〈EXTENDED〉

This article will explain this error occurs, the root cause involving Certificate Authority (CA) rollovers, and—most importantly—exactly how to fix it using step-by-step, actionable solutions.

Thus, when you run the installer, Windows checks the signature, tries to build the certificate chain, fails to find a trusted root, and throws the error:

If you have an offline machine that cannot get the Windows Updates, you can manually inject the specific root certificate.

Method 1: Install the Missing Root Certificate (Recommended) net framework 4.7 2 windows 7 certificate chain error

return errors == SslPolicyErrors.None; ;

Windows 7 doesn't automatically update its "Trusted Root" list as efficiently as newer versions.

For users who haven't updated their Windows 7 system in a while, this error occurs even when downloading the installer directly from Microsoft's official website. This article will explain this error occurs, the

Are you deploying this to a or managing an enterprise network ?

the certificate file ( MicRooCerAut2011_2011_03_22.crt ) from the official Microsoft PKI Repository .

To fix the problem, you must first understand the "chain of trust." For users who haven't updated their Windows 7

How to Fix .NET Framework 4.7.2 Certificate Chain Error on Windows 7

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As an additional layer of complexity, in June 2023, Microsoft made a major change to its Windows Root Certificate Program. They began gradually retiring older root certificates that were secured with the SHA-1 algorithm. If your Windows 7 system has not received updates for several years, your mechanism may be broken or outdated. Installing the manual root certificate update (KB931125) as described above is the only reliable way to resolve this on legacy systems without relying on Windows Update.