What does the path '\REGISTRY\A\...' in Sysinternals Procmon log mean?

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http://superuser.com – I use Sysinternals Procmon utility to monitor the registry access by some programs. Most log entries have the Path property starting from HKCU\… or HKLM\…, that corresponds to the registry hives HKEY_CURRENT_USER and HKEY_LOCAL_MACHINE that can be seen using Regedit. But some entries have the Path starting from \REGISTRY\A\…: Could you please explain what part of the registry it is? Can I see it using Regedit or some other utility? Can I access it programmatically? I am running Windows 8.1 Enterprise x64. (HowTos)