For air-gapped industrial networks, create a . Regularly export the latest root certificates from a trusted online machine and deploy them via Group Policy.
The error message appears when the Windows operating system .
Newer versions of KEPServerEX (v6.7 and later) use advanced code-signing certificates to ensure the software hasn't been tampered with . If your system's "trusted list" doesn't recognize the authority that signed the Kepware installer, Windows blocks the process to protect the system .