If applying Windows Updates is not an option (which is often the case in air-gapped industrial control system environments), PTC suggests a second path. The error message states: "If unable to apply Windows updates, contact support for instructions on installing root certificates".
This error typically targets air-gapped industrial servers, legacy operational technology (OT) systems running older operating systems like Windows 7, or machines lacking recent security patches. This guide breaks down why this verification error happens and outlines clear, step-by-step methods to resolve it. Why This Installation Error Occurs If applying Windows Updates is not an option
Windows cannot automatically update its certificate store to verify the installer's signature. Outdated Windows Updates: If applying Windows Updates is not an option
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