You might also need the DigiCert Global Root CA or Baltimore CyberTrust Root , depending on the exact signing chain. If the error persists, use the Certificates MMC ( certlm.msc ) to view the signature of the .NET installer exe (right-click > Properties > Digital Signatures > Details > View Certificate > Certification Path). The missing certificate will be highlighted with a red X.

The installer fails because it cannot verify the digital signature against a trusted root.

Medium. This update was released before .NET 4.7.2, so it helps but may not be complete.

If your PC is offline, it can't download the necessary certificate updates during installation.

: Adds SHA-2 code signing support . This is essential for modern installers to run on Windows 7.

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