These are the most common CPU‑related Windows hardware error codes, what they mean, and how to fix them.
CPU Error Codes & Fixes
| Error Code | What It Means | Fix |
|---|---|---|
| 0x124 – WHEA_UNCORRECTABLE_ERROR | General hardware failure. Often CPU, VRM, or memory controller. | Remove overclock, check CPU cooling, inspect motherboard power delivery. |
| 0x9C – MACHINE_CHECK_EXCEPTION | CPU detected a serious hardware fault (cache, bus, or ECC). | Check CPU temps, reseat CPU, inspect motherboard socket and VRMs. |
| 0x0 – Internal CPU Error | CPU reported an internal execution or microcode fault. | Update BIOS, reset CPU settings, check for overheating. |
| 0xC0000005 – Access Violation | CPU attempted to access invalid memory. | Check RAM stability, disable CPU overclock, update chipset drivers. |
| 0x7E – SYSTEM_THREAD_EXCEPTION_NOT_HANDLED | CPU encountered an unhandled exception. | Check CPU temps, reset BIOS, test RAM and CPU stability. |
| 0xD1 – DRIVER_IRQL_NOT_LESS_OR_EQUAL | CPU hit an invalid memory reference at high IRQL. | Check CPU overclock, update drivers, test RAM. |
| 0xF – CPU Cache Error | CPU cache returned corrupted data. | Lower CPU overclock, improve cooling, update BIOS. |
| Thermal Trip / CPU Overheat | CPU exceeded safe temperature limits. | Clean cooler, reapply thermal paste, improve airflow. |
| Microcode Update Failure | CPU microcode could not be updated by BIOS. | Update BIOS, reset BIOS settings, check motherboard compatibility. |
| CPU Bus/Interconnect Error | CPU cannot communicate with chipset or memory controller. | Reseat CPU, inspect socket pins, check motherboard for damage. |