How to fix WORKER_THREAD_RETURNED_WITH_NON_DEFAULT_WORKLOAD_CLASS BSoD error in Windows 10/11

What is WORKER_THREAD_RETURNED_WITH_NON_DEFAULT_WORKLOAD_CLASS error

WORKER_THREAD_RETURNED_WITH_NON_DEFAULT_WORKLOAD_CLASS error is a Blue Screen of Death (BSoD) issue that occurs in Windows 11/10. This error typically indicates a problem with a worker thread in the operating system kernel returning with an unexpected workload class. Worker threads are essential components of the Windows operating system, responsible for managing background tasks and ensuring smooth system operation. When a thread fails to return with the expected workload class, it can disrupt the system’s stability, leading to a crash. This error is often caused by faulty or outdated drivers, corrupted system files, or hardware issues. It can also be triggered by third-party software conflicts or malware infections. Users encountering this error may experience sudden system reboots, data loss, or an inability to access their system. Diagnosing the root cause of this error requires a systematic approach, as it can stem from both software and hardware-related issues. Fortunately, there are several troubleshooting steps available to resolve this problem. By addressing the underlying causes, users can restore their system’s stability and prevent future occurrences of this error. Below are the detailed solutions to fix the WORKER_THREAD_RETURNED_WITH_NON_DEFAULT_WORKLOAD_CLASS error in Windows 11/10.

Solutions to Fix WORKER_THREAD_RETURNED_WITH_NON_DEFAULT_WORKLOAD_CLASS Error

1. Update Device Drivers

Outdated or faulty drivers are a common cause of this error. Updating your drivers can resolve compatibility issues and prevent the error from recurring.

1. Press Win + X and select Device Manager.
2. Expand the categories to locate devices with outdated drivers (look for a yellow exclamation mark).
3. Right-click the device and select Update driver.
4. Choose Search automatically for drivers and follow the on-screen instructions.
5. Restart your computer after updating the drivers.

Updating each driver manually is time- and energy-consuming. If you are willing to save it and update drivers faster, we recommend using a special utility called Driver Booster from IObit. It has broad databases of drivers for all of the devices you need to maintain your PC. You can download it using the button below.

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2. Run Windows Memory Diagnostic Tool

Faulty RAM can also cause this error. Use the built-in Windows Memory Diagnostic tool to check for memory issues.

1. Press Win + R, type mdsched.exe, and press Enter.
2. Select Restart now and check for problems.
3. Allow the tool to run and check for memory errors.
4. If errors are detected, consider replacing the faulty RAM module.

3. Perform a System File Check

Corrupted system files can lead to BSoD errors. Use the sfc and DISM tools to repair system files.

1. Press Win + S, type cmd, and select Run as administrator.
2. Run the following command to scan and repair system files: sfc /scannow
3. Wait for the process to complete and restart your computer.
4. If the issue persists, run the following commands one by one:
   DISM /Online /Cleanup-Image /CheckHealth
DISM /Online /Cleanup-Image /ScanHealth
DISM /Online /Cleanup-Image /RestoreHealth
5. Restart your computer after completing the DISM commands.

4. Check for Windows Updates

Installing the latest Windows updates can resolve compatibility issues and fix bugs that may cause this error.

1. Press Win + I to open Settings.
2. Go to Windows Update and click Check for updates.
3. Download and install any available updates.
4. Restart your computer to apply the updates.

5. Uninstall Recently Installed Software

Third-party software conflicts can trigger this error. Uninstall any recently installed programs to identify the culprit.

1. Press Win + I to open Settings.
2. Navigate to Apps > Installed apps.
3. Locate the recently installed software, click the three-dot menu, and select Uninstall.
4. Restart your computer and check if the error persists.

6. Scan for Malware

Malware infections can corrupt system files and cause BSoD errors. Use Windows Security or a third-party antivirus tool to scan your system.

1. Press Win + I to open Settings.
2. Go to Privacy & Security > Windows Security.
3. Click Virus & threat protection and select Quick scan.
4. If threats are detected, follow the on-screen instructions to remove them.

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7. Perform a Clean Boot

A clean boot can help identify if third-party software is causing the error.

1. Press Win + R, type msconfig, and press Enter.
2. Go to the Services tab and check Hide all Microsoft services.
3. Click Disable all and go to the Startup tab.
4. Click Open Task Manager and disable all startup items.
5. Restart your computer and check if the error persists.

8. Check Hardware Components

Hardware issues, such as a failing hard drive or overheating, can cause this error. Perform the following checks:

1. Ensure your computer is not overheating by cleaning dust from fans and vents.
2. Run a hard drive diagnostic tool to check for bad sectors.
3. Replace any failing hardware components.

9. Reset or Reinstall Windows

If none of the above solutions work, resetting or reinstalling Windows may resolve the issue.

1. Press Win + I to open Settings.
2. Go to System > Recovery.
3. Under Reset this PC, click Reset PC.
4. Choose Keep my files or Remove everything based on your preference.
5. Follow the on-screen instructions to complete the reset process.