Bug Check 0x17E: MICROCODE_REVISION_MISMATCH
The MICROCODE_REVISION_MISMATCH bug check has a value of 0x0000017E. It indicates that one or more processors in the multiprocessor configuration have inconsistent microcode loaded.
Important
This article is for programmers. If you're a customer who has received a blue screen error code while using your computer, see Troubleshoot blue screen errors.
MICROCODE_REVISION_MISMATCH Parameters
| Parameter | Description |
|---|---|
| 1 | The processor CPUID signature value of the processor that mismatched. |
| 2 | The expected microcode revision for the processor. |
| 3 | The actual, reported microcode revision for the processor. |
| 4 | The processor index of the mismatching processor. |
Cause
One or more processors in the multiprocessor configuration have inconsistent microcode loaded. This bugcheck indicates that faulty system firmware has mistakenly applied a microcode update to only a subset of processors in the host configuration. System firmware must apply microcode updates to all processors in a uniform fashion.