Kepware The Installer Was Unable To Find Required Root Certificates Exclusive

Critically, the installer does not download missing certificates automatically if the machine is offline or if Windows Update is disabled. This is a security feature—preventing automatic installation of untrusted certificates—but it becomes a roadblock for legitimate software.

You must import the file directly into the local computer account rather than the current user profile.

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The core reason for this issue comes down to digital trust and security. Kepware installers are signed with modern digital certificates from major authorities like , VeriSign (DigiCert) , or Microsoft to ensure that the executable files have not been modified or corrupted.

If your server is in an offline environment (OT network), you must manually import the required certificates. You will need to obtain the latest .cer files from a machine that does have internet access. : The core reason for this issue comes

Fix 1: Manually Inject Root Certificates via MMC (Recommended for Air-Gapped Systems)

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This is the most frequent cause. If the target machine is running an older version of Windows (e.g., Windows 7, Windows Server 2008/2012, or an early build of Windows 10) and has not been updated recently, the local certificate store will be outdated. Newer Kepware installers are signed with certificates that rely on modern root authorities (such as DigiCert or Sectigo) that older OS versions do not recognize by default. You will need to obtain the latest

A. Restore/update Windows Trusted Root Certificate store

For air-gapped networks, maintain a Windows Server Update Services (WSUS) server that distributes the Update for Root Certificates package to all OT machines.

The "exclusive" part of the error can occur if the Windows automatic root certificate update feature tries to lock the store while Kepware is attempting to read it.

This error is most common in the following scenarios: Windows Server 2008/2012

When running the or PTC Kepware products installer, the error message "The Installer was unable to find required root certificates" typically occurs because the host operating system lacks up-to-date certificate authorities required to verify the installer's digital signature . This is common on legacy systems like Windows 7 or servers that have been offline and missed critical Windows Updates . Core Reasons for Failure

Obtain the required .cer or .crt files from a machine with internet access or the PTC Support Portal .

C:\Users\%USERNAME%\AppData\Local\Temp\Kepware_Install.log

Open the on your domain controller.