What does BSOD 120 (PHASE0_EXCEPTION) mean?

 
Could be also:
ConstantTypeOS
ERROR_CALL_NOT_IMPLEMENTEDWin32 errorWindows
EISNAMerrnoLinux
EPROTONOSUPPORTerrnoSolaris
ENODATAerrnoWindows
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KERNEL_STACK_INPAGE_ERROR MISMATCHED_HAL

PHASE0_EXCEPTION

The PHASE0_EXCEPTION bug check has a value of 0x00000078.

This bug check occurs when an unexpected break is encountered during HAL initialization. This break can occur if you have set the /break parameter in your boot settings but have not enabled kernel debugging.

Important

This topic is for programmers. If you are a customer who has received a blue screen error code while using your computer, see Troubleshoot blue screen errors.

Dump evidence for PHASE0_EXCEPTION

For PHASE0_EXCEPTION, preserve the complete dump, the four bug-check parameters, the exact Windows build, loaded-module list, and the event timeline immediately before the stop. AllStat summarizes the condition as “PHASE0_EXCEPTION”; that sentence identifies the failure class, while the parameters and stack determine which object, driver, processor, or subsystem instance was involved.

Analysis order for PHASE0_EXCEPTION

  • Run WinDbg !analyze -v, then inspect the documented meaning of each PHASE0_EXCEPTION parameter instead of relying only on the probably-caused-by line.
  • Find the earliest abnormal event: driver update, firmware change, device reset, storage error, verifier report, resource exhaustion, or application hang connected with phase0 / exception.
  • For PHASE0_EXCEPTION, keep third-party filter, security, storage, graphics, and virtualization drivers in the module inventory; removing evidence before dump analysis can obscure the responsible path.

Do not repeatedly reboot a machine affected by PHASE0_EXCEPTION before collecting the dump and event logs. For PHASE0_EXCEPTION, recovery actions should follow the component identified by the stack and parameters, not merely the symbolic stop-code name.


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