What does BSOD 0x163 (WORKER_THREAD_TEST_CONDITION) mean?

 
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WORKER_THREAD_TEST_CONDITION

Kernel worker-thread diagnostic condition for WORKER_THREAD_TEST_CONDITION

WORKER_THREAD_TEST_CONDITION is bug check code 0x00000163.

This code is tied to kernel worker-thread test or diagnostic paths. It is useful when a checked, instrumented, or diagnostic kernel path deliberately validates worker-thread behavior rather than when an application thread simply becomes busy.

How to read it in a dump

  • Look for worker-thread, delayed-work, or executive worker queue frames in the dump.
  • Check whether the machine was running verifier, test signing, internal diagnostics, or stress tooling.
  • The queued work item and owning driver matter more than the constant name.

What to check

  • Inspect worker queue state and the module that queued the current work item.
  • Disable lab-only stress or verifier settings only after collecting the dump.
  • Check for drivers that block worker threads or recursively queue work without progress.

References


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