Kepware The Installer Was Unable To Find Required Root Certificates Exclusive | FAST | Anthology |

If the server must remain offline or cannot be updated, you must manually install the required root certificates (often from issuers like GlobalSign or VeriSign):

Manually choose the store for the placement.

If manual installation of GlobalSign or Microsoft root certificates does not work, it is recommended to open a support ticket with the Kepware team for specific offline certificate packages. If the server must remain offline or cannot

If the error persists, review the installation logs to identify which specific certificate is missing. You can find these at: C:\Program Files (x86)\Kepware\KEPServerEX\bootstrap.log

: If you see errors about "invalid digital signatures" alongside the root certificate warning, it often indicates the installer cannot verify its own integrity because the chain of trust is broken at the root level. If the server must remain offline or cannot

The error message typically occurs during the installation or upgrade of PTC Kepware products when the Windows operating system lacks the necessary updated root certificates to verify the installer's digital signature. This is common on systems that are offline or have disabled Windows Updates, as they cannot automatically download new Certificate Revocation Lists (CRLs) or Trusted Root CAs. Primary Solutions

Right-click the certificate file and select . If the server must remain offline or cannot

: If you are trying to connect via OPC UA after installation and see certificate errors, you may need to use the OPC UA Configuration Manager to manually trust the server's self-signed certificate.

To resolve this issue, you must ensure the system can trust the certificates used by the Kepware installer.

: Users on older operating systems like Windows 7 or Windows XP SP3 frequently encounter this because these versions no longer receive automatic certificate updates.