If the problem persists after trying the steps above, contact PTC Kepware support with the installer log – they can provide the exact thumbprint of the required root certificate for your product version.
Before you spend time on certificates, make sure the installer file itself isn't corrupt: Right-click the .exe installer and select . Go to the Digital Signatures tab. Select the signature and click Details . If the problem persists after trying the steps
: Ensure no firewalls or security software (like Kaspersky) are blocking the installer from verifying signatures online. Bootstrap Logs Select the signature and click Details
with elevated permissions to allow the installer to access or update system stores. Review: Kepware KEPServerEX If the problem persists after trying the steps
Once you've downloaded the certificate, you can manually add it to your system's trusted root certification authorities.
If the installer finishes but connections fail, use the to swap and trust client/server certificates.
