HP EliteBook Folio 9470m Notebook PC (ENERGY STAR) User Manual Page 15

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OA3
Win8 features a new version of the OEM activation mechanism, the OEM Activation 3.0 (OA 3.0).
Microsoft Digital Marker Key injection
A standard HP method to inject the Microsoft Digital Marker (MSDM) key into ACPI will be supported by the BIOS for
usage by the factory and service using the HP BIOS Configuration interface available in both Windows (Public WMI) and
UEFI. The following processes are supported by the implementation.
Manufacturing Process
The key is cleared when a complete BIOS flashing occurs. The key remains unlocked until the first time the key is written.
The key may be written multiple times in manufacturing mode (MPM or other) without unlocking. If the key is written in
manufacturing mode, it will be locked when manufacturing mode is exited. After the key is locked, a key unlock using a
Physical Presence Check is required to rewrite the key.
NOTE: It is important that a key is always written before the unit leaves the factory. For non-Win8 systems, all FFh must
be written to the key to assure that the MSDM table in ACPI is cleared (no MSDM entry appears in ACPI space.).
Service process
The key is locked when it leaves the factory. Changing the key first requires an unlock using a Physical Presence Check.
After the Physical Presence Check is completed, writing all FFh is used to clear the key from the MSDM ACPI table. A
reboot is required after the all-FFh write to set the MSDM table in ACPI.
BIOS functionality
The following functionality is provided by the BIOS to manage the OA3 key:
Reading the key:
The key can always be read from WMI or UEFI under “MS Digital Marker.
Reading the key always returns the last key value accepted by the BIOS.
After a full BIOS reflash, the MS Digital Marker property will not be present in the BIOS, and the ACPI MSDM table
will be cleared.
Writing a key:
Writing the key from WMI using “MS Digital Marker” requires a blank key slot, or that the key is first unlocked by
using Physical Presence Check or by a complete BIOS flash.
After a key is written, a reboot is always required to set the key in the MSDM ACPI table.
Writing all FFh as a key clears the MSDM Table in ACPI (See Clearing the Key” below).
Clearing the key:
A complete BIOS re-flash clears the key and the MSDM table in ACPI.
o This method is used only in the factory environment.
o Reading the key after the re-flash
Writing the key as all FFh clears the MSDM table in ACPI.
o See Writing the key for Physical Presence Check requirements.
o Reading the key after the write returns all FFh.
o A reboot is required in order to clear the MSDM ACPI table.
SMC_RESET_PLATFORM_TO_FACTORY_DEFAULT - No other method is provided to clear the key. This includes:
Reset to Factory default through F10, WMI
SMC_RESET_BIOS_TO_FACTORY_DEFAULT_SAVE_IDENTITY
Standard BIOS updates
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