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ERROR_FIRMWARE_UPDATED
Windows detected a firmware change since the previous boot
ERROR_FIRMWARE_UPDATED corresponds to Win32 error value documented as: Windows has detected that the system firmware (BIOS) was updated [previous firmware date = %2, current firmware date %3]. The platform firmware date or version differs from the value previously recorded. Such a change can alter ACPI tables, device enumeration, security settings, boot behavior, and power management.
Where the result appears in real systems
- First boot after BIOS or UEFI update.
- Automated hardware inventory.
- Boot diagnostics after vendor servicing.
What to collect before making changes
Record previous and current firmware versions and dates, update package identity, Secure Boot state, TPM measurements, and newly enumerated devices; review vendor release notes and Windows System events.
Handling and recovery
Complete any vendor-requested reboot cycle, verify security and virtualization settings, and retest affected devices. Management software should update its inventory baseline only after confirming the firmware change is expected.
What not to infer from this code
This result is an observation, not proof of a bad update. Problems after the transition require separate evidence such as device errors or failed boot measurements.
References
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