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Ensure that HKLM\SOFTWARE\Policies\Microsoft\SystemCertificates\AuthRoot\DisableRootAutoUpdate is not set to 1 . Step-by-Step Manual Import Process

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.

Delete the corrupted certificate store cache:

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.

Open the dialog (Win + R), type certmgr.msc , and press Enter.

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