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The MSI log excerpt above pertains to a problem in determining the package source type. This issue happens when the filename of the MSI installer used to install the Apex One Security Agent is not the same with the one being used to do an upgrade.

To resolve the issue:

 
Here is the product GUID of an Apex One Security Agent: 1EFA14817AB44D447800A6FC68A0E81D.
  1. Open Registry Editor (regedit.exe) and go to the following Product Folder Key:

    HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Installer\Products\1EFA14817AB44D447800A6FC68A0E81D\SourceList\

  2. Take note of the PackageName REG_SZ value.

    Error 1316

  3. Do either of the following before upgrading the Security Agent:
    • Change the filename of the Apex One Security Agent MSI Installer to the PackageName found in the SourceList sub-key.
    • Change the PackageName found in the SourceList sub-key back to the default Apex One Security Agent MSI Package (i.e. "AcAgentSetup_x64.MSI" or "AcAgentSetup_x86.MSI").
Keywords: Error 1316, The specified account already exists, fail upgrade Security Agent, SA upgrade fail, cannot upgrade SA, cannot upgrade Security agent, failure to upgrade SA