How to Fix Windows Error 0x00000124 — WHEA Uncorrectable Error [2026]

Windows Error 0x00000124: WHEA Uncorrectable Error

This error typically occurs when cpu overheating due to poor cooling. Below you'll find 5 proven fixes to resolve it.

What Causes Windows Error 0x00000124?

Windows error 0x00000124 (WHEA Uncorrectable Error) can be triggered by several issues:

CPU overheating due to poor cooling
RAM failure or incompatibility
Power supply unit instability or low wattage
CPU or RAM overclocking beyond stable limits
Failing or degraded motherboard

How to Fix Windows Error 0x00000124 — Step by Step

Check temperatures with HWMonitor

Download HWMonitor from cpuid.com and monitor CPU temperatures under load. CPU should stay below 90C. If it exceeds that, clean the heatsink, reapply thermal paste, or improve case airflow.

Reset BIOS to default settings

Restart > enter BIOS (Del/F2) > find Load Optimized Defaults or Reset to Default > Save and exit. This eliminates any overclocking or misconfiguration causing hardware errors.

Run MemTest86 for RAM failures

Boot from a MemTest86 USB and run at least 4 passes. If errors are found, test sticks individually to identify the faulty one. Replace any failing RAM.

Check PSU voltages

Download HWMonitor and check the 12V, 5V, and 3.3V rails under load. Values should be within 5% of nominal. Sagging voltages indicate a failing or undersized PSU.

Reseat all components

Power off completely and unplug. Reseat the RAM, GPU, and any PCIe cards. Reseat the CPU cooler. Loose connections cause hardware communication errors that trigger WHEA.

Still Getting Error 0x00000124?

IT Cares can diagnose and fix this error remotely — usually in under 30 minutes.

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Frequently Asked Questions

What does WHEA_UNCORRECTABLE_ERROR mean?

WHEA stands for Windows Hardware Error Architecture. This stop code means Windows detected a hardware error it could not correct — most often CPU, RAM, or power-related.

Is WHEA always a hardware problem?

Mostly yes, but overclocking and outdated BIOS can also cause it. Start by resetting BIOS defaults before assuming hardware has failed.

Can this error damage my PC?

The error itself does not cause damage — Windows crashes to protect hardware. But the underlying cause (overheating, PSU instability) can damage components over time if not fixed.

Will replacing the CPU fix it?

Sometimes, but CPUs rarely fail. More commonly the cause is RAM, PSU, or cooling. Test RAM and PSU before spending money on a new CPU.

How do I know if my PSU is failing?

Symptoms include random crashes under load, PC not starting, and voltage instability in HWMonitor. A PSU tester or known-good PSU swap confirms a failing unit.

How to Fix Windows Error 0x00000124 — WHEA Uncorrectable Error