Kepware The Installer Was Unable To Find Required Root Certificates Exclusive <720p 2026>

This error typically occurs when your system lacks the updated root certificates required to verify the digital signature of the KEPServerEX installer. It is most common on machines without active internet access or those with disabled Windows Updates.

If updates are not possible, you must manually import the missing root certificates into the Trusted Root Certification Authorities store for the Local Machine .

In many plants, Windows Update is permanently disabled to prevent unexpected reboots. To avoid this error in the future, include as part of your standard server "hardening" or commissioning checklist before moving equipment to the production floor.

where updates are no longer available, you may need to manually source the specific GlobalSign root certificates from a modern machine or the Official PTC Support Portal Admin Rights: Always run the installer as an Administrator This error typically occurs when your system lacks

Maintain a folder on your industrial network containing the .CER files of the top 20 Global Root CAs. This saves hours of troubleshooting during future installations.

Click and select Trusted Root Certification Authorities . Complete the wizard and restart your machine. Rerun the Kepware Installer. Alternative Solutions If Certificates Still Fail

If you cannot use the official patch and Windows Update is not an option, you can manually import the certificates. You will need to identify and download the specific certificate files (usually in .cer , .crt , or .p7b format). In many plants, Windows Update is permanently disabled

Windows cannot automatically update its certificate store to verify the installer's signature. Outdated Windows Updates:

: Industrial automation servers are purposely isolated from the internet. This prevents the OS from utilizing the native Windows Update Lazy Loading feature to pull down new third-party roots on demand.

If your machine can be safely connected to the internet or an internal Windows Server Update Services (WSUS) server, patching the host is the fastest resolution. Open the Windows menu and select Settings . Navigate to Update & Security > Windows Update . Click Check for updates . or .p7b format).

. This is common on systems that are offline or haven't received recent Windows updates. Quick Fixes Apply Windows Updates

If any certificate in the chain is missing or untrusted, the installer aborts to prevent execution of potentially tampered software.

An error return code of 0x65B explicitly confirms that the system's cryptographic functions cannot find a trusted certificate trail. Step-by-Step Solutions

. This is especially common on air-gapped systems or older versions of Windows Server (e.g., 2016) that haven't received recent Windows Updates Immediate Solutions