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STATUS_MCA_EXCEPTION
The processor reported a Machine Check Architecture event
Machine Check Architecture allows processors to report hardware-detected faults such as cache, memory-controller, bus, or execution errors. This status indicates dispatch of an MCA-related exception; it is not normally repaired by retrying the application operation that happened to be running on the thread.
On modern Windows, hardware error reporting is integrated with WHEA. Correlate the status with WHEA-Logger events, error records, processor bank information, firmware logs, and hardware telemetry. The application stack identifies what was executing when the processor reported the condition, but it may not identify the defective component. Repeated events on the same bank, core, DIMM, or PCIe path are more useful than reinstalling the crashing application.
What to inspect
- Collect WHEA error records and System log events from the same timestamp.
- Record processor APIC ID, bank, error source, and corrected-versus-fatal severity.
- Check firmware, microcode, memory, power, thermal, and overclocking conditions.
- Avoid treating an MCA report as an ordinary deterministic application exception.
References
- Microsoft Learn: Windows Hardware Error Architecture definitions
- Microsoft Open Specifications: NTSTATUS values
- Microsoft Windows SDK metadata: ntstatus.h
- Microsoft Learn: Exception Dispatching
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