What does Windows error code 669 (ERROR_ACPI_ERROR) mean?

 
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ERROR_ASSERTION_FAILURE ERROR_WOW_ASSERTION

ERROR_ACPI_ERROR

What ERROR_ACPI_ERROR means

ACPI is the firmware interface Windows uses for power management, device discovery, sleep states, batteries, thermal zones, and platform controls. A failure here often reflects firmware tables or AML methods rather than an ordinary application problem.

Where it appears

  • boot or device enumeration
  • sleep, resume, hibernation, and shutdown
  • battery, thermal, lid, docking, or power-policy changes

Likely causes

  • invalid or incompatible BIOS/UEFI ACPI tables
  • firmware methods returning malformed values
  • chipset or platform driver mismatch
  • virtual-machine firmware exposing incomplete ACPI behavior

What to collect

  1. System log entries from ACPI, Kernel-Power, and related providers
  2. BIOS/UEFI version and machine model
  3. sleep-study or powercfg reports when transitions fail
  4. whether the problem began after firmware, chipset, or OS updates

How to respond

Install the vendor-supported firmware and chipset packages, reset unsupported firmware tuning, and reproduce on the current BIOS. For virtual machines, update the hypervisor tools and virtual hardware level. Application retries cannot repair malformed ACPI firmware.

References


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