for the specific root certificates commonly required for these legacy Windows installations? Kepserverex Root Certificate - Google Groups
This error implies that the installer cannot verify the digital signature of the Kepware installation files, leading to a security failure. Below is a comprehensive guide to understanding and solving this issue. What Causes This Error? for the specific root certificates commonly required for
Open regedit and navigate to: HKLM\SOFTWARE\Policies\Microsoft\SystemCertificates\AuthRoot . Ensure DisableRootAutoUpdate is set to . What Causes This Error
+--------------------------------------------------------+ | Kepware Installer Package | | (Signed with modern SHA-256 Third-Party Certificates) | +--------------------------------------------------------+ │ ▼ +--------------------------------------------------------+ | Windows Security Validation | | Checks Local Machine Trusted Root Store for Anchor | +--------------------------------------------------------+ │ ┌──────────────┴──────────────┐ ▼ ▼ [Certificate Found] [Certificate Missing] │ │ ▼ ▼ Installation Proceeds ERROR: "The installer was unable to find required root certificates" air-gapped industrial PCs
The halts the setup of PTC Kepware Server (formerly KEPServerEX) because the Windows host lacks the necessary public key infrastructure (PKI) root authorities to verify the installation package's digital signature. This issue most frequently hits OT (Operational Technology) servers, air-gapped industrial PCs, and older operating systems like Windows 7 or unpatched Windows Server environments that cannot validate modern SHA-256 code-signing credentials. Why the Kepware Installation Fails
Kepware often provides different installation packages. The full setup package strictly enforces signature validation.
Identify the vendor signing the Kepware executable. Right-click the Kepware installation file, select , and go to the Digital Signatures tab.