How to Fix WHEA_UNCORRECTABLE_ERROR Error in Windows

When a blue screen appears with the code WHEA_UNCORRECTABLE_ERROR, the computer reboots after collecting diagnostic data, leaving a feeling of uncertainty. This is usually a hardware-related failure., but it can also be caused or aggravated by faulty drivers, recent changes to Windows, overclocking, or other system factors.

It's not a trivial error and can sometimes be persistent, but it can be solved. In this guide, you'll find a comprehensive and organized approach: from the most probable causes to quick checks, from recovery methods to advanced repairs (MBR/BCD), plus tips to prevent data loss and tools that can help if your system won't boot.

What is WHEA_UNCORRECTABLE_ERROR and why does it appear?

The WHEA_UNCORRECTABLE_ERROR message is usually accompanied by the text of blue screen typical and of the stop code 0x0000124. WHEA stands for Windows Hardware Error Architecture, which indicates that Windows has detected a hardware error signal that it cannot automatically correct.

In addition to unexpected reboots, it is not uncommon for unsaved data to be lost during a crash. If the BSOD repeats frequently, it is advisable to act as soon as possible to identify the cause and reduce the risk of corruption in disks or system files.

Common causes of WHEA_UNCORRECTABLE_ERROR

This error can have different origins, but the most repeated in real cases are the following. Knowing them helps prioritize checks and save time in diagnosis.

• Hardware failure: Faulty or improperly seated RAM, improperly seated CPU, unstable power supply, faulty motherboard, unstable GPU, or disk with bad sectors.
• Conflicting or corrupted drivers: after Windows or driver updates, especially graphics and chipset updates.
• Overclocking and Improper Voltages: Out-of-spec frequencies and CPU power states (C-State) may result in instability and higher temperatures.
• Corrupted system files: Corruption in the file system or boot components (MBR/BCD) that trigger erratic behavior.
• Recent changes in Windows: installations of updates, new drivers, or applications that alter critical components.

Quick checks before touching the system

Before getting into the in-depth solutions, a basic physical review is worthwhile. A simple cleanup and check can avoid hours of trial and error..

Check the equipment ventilation and dust accumulation on fans, heatsinks and grills. Overheating due to clogging It is a more common cause than it seems and can trigger blue screens under load.

Verify that the RAM is securely fixed in its slots and that the CPU hasn't moved (on a desktop). If you're not comfortable handling hardware, skip ahead to the steps in Windows, but keep in mind that poor RAM/CPU contact can trigger unpredictable errors.

Step-by-step solutions

Here are a series of solutions to eliminate the WHEA_UNCORRECTABLE_ERROR:

Method 1: Scan your computer for malware

Malware and adware can damage system services, drivers, or cause file corruption. Run a full scan with your updated antivirusIf you don't have one, use Microsoft's Malicious Software Removal Tool. Remove any detected threats and restart.

Method 2: Install all available Windows updates

Windows continuously releases stability and compatibility patches. Open Settings > Update & security > Windows Update and tap Check for updates. Install the slopes, reboot and check if the problem goes away.

Method 3: Check the hardware and test the RAM

Open the tower (if it's a desktop) and secure the memory modules: remove and reseat each module until the clips fit 100%. A poorly seated RAM It is a classic trigger for WHEA_UNCORRECTABLE_ERROR.

To check for errors, run the Windows Memory Diagnostic (type “Windows Memory Diagnostic” in Start) or use MemTest86 from a bootable USB drive. If errors appear, test individual modules or replace them.

Method 4: Update, roll back, or reinstall drivers

Corrupt or incompatible drivers are common after an update. In Safe Mode, open Device Manager with Windows + R > devmgmt.msc. Look for warning signs (yellow/red icons), update those drivers or uninstall them and restart so that Windows can reinstall them.

Also check Settings > Update & security > Windows Update > View update history and uninstall (temporarily) recent drivers if the error appeared right after their installation.

Method 5: Temporarily disable real-time protection

Some security suites may interfere with low-level drivers. In Windows Security > Viruses & threats > Manage settings, disable Temporary real-time protection and restart. If the problem persists, consider reinstalling or changing your antivirus solution.

Method 6: Check the disk with CHKDSK

chkdsk C: /f

And if you suspect bad sectors (it will take longer), run the deep repair variant: This reading attempts to recover sectors problematic.

chkdsk C: /r

If Windows is on another drive, change the letter in the command. After finishing, reboot and check if the BSOD disappears.

Method 7: Disable overclocking and reset BIOS/UEFI

If you've messed with frequencies, voltages, or XMP profiles, reset them to factory settings. Enter BIOS/UEFI from boot and load Load Optimized Defaults (or equivalent). Disables any overclocking settings (CPU/GPU/RAM) and save changes.

Some teams report improvement when deactivating Intel C-State (CPU power-saving states). Navigate to Advanced > CPU Configuration > CPU Power Management and set CPU C-State to Disabled, if supported by your manufacturer.

Method 8: Rebuild boot (MBR/BCD) with installation media

If the boot is damaged, you can repair it from the Windows installation environment (DVD/USB). Boot from the media and choose Repair your equipment > Troubleshoot > Advanced Options > Command Prompt. Run:

bootrec /fixmbr
bootrec /fixboot
bootrec /rebuildbcd

If the error persists, rename the BCD store and rebuild it with bcdboot (adjust drive letters accordingly). Make sure you point to the correct Windows path:

ren BCD BCD.old
bcdboot C:\Windows /l en-us /s G: /f ALL

Exit the command prompt, eject the media, and reboot. A BCD in good condition prevents boot problems that can lead to intermittent BSODs.

Method 9: Perform a clean boot

To rule out software conflicts, open Run with Windows + R, type msconfig and in Services check “Hide all Microsoft services” and click Disable all. In the Start tab open the Task Manager and disable startup items. Restart and see if the error disappears.

Method 10: Disconnect peripherals and test ports

Remove all USB devices (storage, printers, hubs, etc.). Work with alternative keyboard and mouse To rule out a faulty peripheral, connect each device one by one, preferably to the same port, to determine whether the problem is with the port or the peripheral.

If you use a dedicated graphics cardTry temporarily removing it (if your CPU has integrated graphics) and connecting the monitor to the motherboard. If the BSOD disappears, you've identified the suspicious component.

Method 11: Restore the system to a previous point

If the error occurs after a recent change (driver/update/program), System Restore can reverse it without touching your personal files. Search for “System Restore” in Start > Recovery > Open System Restore and select a point prior to the incident.

Method 12: Go back to a previous version of Windows or undo changes

If the problem started after a major update, you can roll back to the previous build by going to Settings > Update & security > Recovery > Return to previous version (if available). This process uninstalls recent patches that might cause incompatibilities.

Method 13: Update BIOS/UEFI

Manufacturers release firmware updates that correct compatibility and stability. From BIOS/UEFI, use the firmware update pointing to the file on a USB flash drive, following the manufacturer's instructions exactly. Do not interrupt the process.

Method 14: Repair Windows with an installation or repair disc

From a Windows installation DVD/USB, choose Repair your equipment and access Startup Repair, System Restore, and Advanced options. On healthy computers, you can create a repair disc (Control Panel > Backup and Restore > Create a system repair disc) for use on the affected PC.

Method 15: Clean Installation of Windows

It is the last resort when all else fails or there is severe corruption. back up your files, create an installation media, boot from it, and choose “Install Now.” You can enter your key or continue without it to activate it later. Select the correct edition and choose “Installation Type.” Customized. Delete the previous system partition (after confirming the backup), install and configure.

Good practices to prevent its reappearance

• Make sure you stay up to date with security updates. Windows Defender have triggered specific conflicts.
• Keep Windows and drivers up to date, but avoid installing beta or unsigned drivers unless necessary.
• Avoid aggressive overclocking in production equipment or without adequate cooling.
• Take care of dust and ventilation, check that the fans are working and renew the thermal paste if it has been years since installation.
• Perform regular backups to minimize the impact of any unexpected BSODs.

Combining physical checks, software adjustments, and boot repairs when necessary is all that's needed. With a methodical approach—and remembering to protect and recover your data if the system doesn't boot— It is essential to restore stability to the PC and prevent the WHEA_UNCORRECTABLE_ERROR from surprising you again at the worst possible time.