This error occurs when the update installer is corrupt, files on the disk are corrupt, or the certificates for file validation are not installed or up-to-date.
The update installer checks both its own digital signature and those of the existing files to ensure their integrity before allowing the update to proceed.
All product files are signed using Global Sign certificates. Some Windows installations do not contain Global Sign's root certificates authority as trusted root certificates or have non-current certificates. This issue is typically observed on servers with locked-down security settings, or servers with no internet access or latest updates installed.