How to Fix WHEA UNCORRECTABLE ERROR on Windows 11

What is WHEA

WHEA_UNCORRECTABLE_ERROR is a Windows blue screen (BSOD) indicating a hardware error the system can't recover from. Despite the name, it's often caused by software — particularly Intel CPU microcode bugs and Nvidia driver crashes.

Common Causes

• Intel 13th/14th gen CPU microcode bug (most common in 2024-2026)
• Nvidia driver crashes (especially after updates)
• CPU or GPU overclocking instability
• RAM failure or incorrect XMP settings
• SSD firmware issues
• Overheating components

Check Event Viewer

Open Event Viewer (Win+X → Event Viewer) → Windows Logs → System. Look for:

• Source: WHEA-Logger — tells you which component failed
• Machine Check Exception (MCE) — CPU error
• PCIe error — GPU or NVMe issue

# PowerShell: Quick WHEA check
Get-WinEvent -FilterHashtable @{LogName='System';ProviderName='Microsoft-Windows-WHEA-Logger'} -MaxEvents 10

Intel Microcode Fix

Intel 13th/14th gen (Raptor Lake) CPUs have a known degradation issue:

• Update your motherboard BIOS to the latest version
• Look for '0x129' microcode update specifically
• This patches the voltage regulation bug causing CPU degradation
• If crashes persist after BIOS update, the CPU may need RMA

Nvidia Driver Fix

If WHEA points to PCIe or NvLddmkm:

• Download DDU (Display Driver Uninstaller)
• Boot into Safe Mode
• Run DDU to completely remove Nvidia drivers
• Install a specific known-stable driver version (not always the latest)
• Disable Resizable BAR in BIOS if crashes persist

Disable Overclocking

• Disable XMP/EXPO in BIOS — run RAM at stock speeds
• Remove any CPU overclocks (restore BIOS defaults)
• Disable GPU overclocks (MSI Afterburner → reset)
• If crashes stop, re-enable one at a time to isolate the cause

Hardware Diagnostics

• RAM: Run MemTest86 (boot from USB, 4+ passes)
• SSD: Check with CrystalDiskInfo for SMART errors
• CPU: Run Prime95 for 30 minutes — if it crashes, CPU or cooling issue
• Temps: HWiNFO64 to monitor temperatures under load

SFC/DISM Scans

# Run as Administrator in PowerShell:
sfc /scannow
DISM /Online /Cleanup-Image /RestoreHealth

These repair corrupted Windows system files that might trigger WHEA errors.

When to RMA

Contact the manufacturer if:

• BIOS update + driver clean install doesn't fix it
• MemTest86 shows errors (RAM RMA)
• CrystalDiskInfo shows failing SMART attributes (SSD RMA)
• Crashes occur even at stock settings with clean drivers (CPU/GPU RMA)

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