What does BSOD 0x6E (BOOTPROC_INITIALIZATION_FAILED) mean?

Status / error code:		Category:

Constant name:
Source:		Operating System:
Description: Boot processor initialization failed during Windows startup.

Could be also:
Constant	Type	OS
ERROR_OPEN_FAILED	Win32 error	Windows
ETIMEDOUT	errno	Linux
EHOSTUNREACH	errno	Windows
SESSION2_INITIALIZATION_FAILED	BugCheck Code	Windows

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SESSION2_INITIALIZATION_FAILED	SESSION3_INITIALIZATION_FAILED

BOOTPROC_INITIALIZATION_FAILED

Boot processor startup failure for BOOTPROC_INITIALIZATION_FAILED

BOOTPROC_INITIALIZATION_FAILED is bug check code 0x0000006E.

This bug check points at initialization of the processor that brings up the kernel. It is related to CPU topology, firmware, HAL, interrupt/timer setup, and multiprocessor startup state.

How to read it in a dump

The boot processor differs from secondary processors that are brought online later.
Firmware, hypervisor, CPU microcode, interrupt controller, and ACPI state are important evidence.
This is lower-level than a driver service failing to start.

What to check

Check firmware, CPU configuration, virtualization settings, and recent platform changes.
Compare with CLOCK_WATCHDOG_TIMEOUT or HAL initialization failures if present.
Capture boot debugging output on repeatable early-boot failures.

References

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