How to Fix An Error Occurred While Loading the Troubleshooter in Windows 11

Windows troubleshooters are built-in diagnostic tools designed to detect and automatically fix common system issues. But sometimes, when you try to launch one, you might see the message: “An error occurred while loading the troubleshooter.”

This error prevents you from running the tool and usually appears when system files are missing, registry permissions are corrupted, or Windows scripts fail to execute properly. Fortunately, there are several proven methods to resolve this problem.

In this guide, we’ll walk you through step-by-step solutions to fix the “An error occurred while loading the troubleshooter” issue on Windows 11.

Common Causes of This Error

Before we get into the fixes, here are the most common reasons why this error occurs:

• Damaged or missing system files
• Script execution restrictions in Windows
• Incorrect region or language settings
• Corrupted Windows Troubleshooter packages
• Problems with Windows Management Instrumentation (WMI)
• Outdated Windows components or registry misconfigurations

Now let’s go through each solution in detail.

1. Run System File Checker (SFC) and DISM

Corrupted system files are one of the most common reasons troubleshooters fail to load properly. Running SFC and DISM repairs these files.

1. Press Windows + S, type cmd, and select Run as administrator.
2. In the Command Prompt window, run the following command: sfc /scannow Wait for the scan to complete (it may take several minutes).
3. Next, run the following DISM commands one by one: DISM /Online /Cleanup-Image /CheckHealth DISM /Online /Cleanup-Image /ScanHealth DISM /Online /Cleanup-Image /RestoreHealth
4. After the process finishes, restart your PC.

Now try running the troubleshooter again to see if the error is gone.

2. Re-register Troubleshooter Components via PowerShell

Sometimes, the troubleshooter files or scripts become unregistered. Re-registering them can fix the issue.

1. Press Windows + X and select Windows Terminal (Admin).
2. Copy and paste the following command, then press Enter: Get-AppxPackage Microsoft.Windows.SecHealthUI | Reset-AppxPackage
3. Then, execute the following command to re-register Windows troubleshooters: regsvr32 msxml3.dll regsvr32 jscript.dll regsvr32 vbscript.dll
4. Once done, close PowerShell and restart your computer.

Try opening a troubleshooter (like Network or Windows Update) again.

3. Check Script Execution Policies

Windows uses scripts for many built-in troubleshooters. If script execution is disabled, you’ll likely see this error.

To fix it:

1. Press Windows + S, type PowerShell, right-click it, and select Run as administrator.
2. Run the command below: Get-ExecutionPolicy If it returns Restricted, you’ll need to change it.
3. Run this command: Set-ExecutionPolicy RemoteSigned
4. Type Y and press Enter to confirm.

After that, close PowerShell and test if the troubleshooter works properly.

4. Reset the Windows Troubleshooter Configuration

If the troubleshooter component files are corrupted, resetting the configuration can fix the problem.

1. Press Windows + R, type: %localappdata%\Diagnostics and press Enter.
2. Delete all files inside the Diagnostics folder.
3. Open File Explorer again and go to: C:\Windows\Diagnostics\System
4. Ensure all folders here (like Audio, Network, Power, etc.) are intact.

Restart your PC and check if troubleshooters now open without error.

5. Verify Region and Language Settings

In rare cases, mismatched region or language settings can cause script-related troubleshooters to fail.

1. Open Settings → Time & language → Language & region.
2. Under Country or region, select your actual country (for example, United States).
3. Under Preferred languages, make sure English (United States) is listed. If not, click Add a language and install it.
4. Restart your system.

After rebooting, try opening the troubleshooter again.

6. Restart the Windows Management Instrumentation (WMI) Service

The Windows Troubleshooter relies on WMI to gather system information. If WMI is not working, troubleshooters will fail to load.

1. Press Windows + R, type: services.msc and hit Enter.
2. Find Windows Management Instrumentation in the list.
3. Right-click it and choose Restart.

Then, restart your PC and recheck if the troubleshooter opens correctly.

7. Use the Microsoft Troubleshooter Tool Online

If local troubleshooters aren’t working, you can use Microsoft’s official online troubleshooters instead.

1. Visit the Microsoft Support Diagnostic Tools page.
2. Download the specific troubleshooter you need (for example, Windows Update Troubleshooter or Bluetooth Troubleshooter).
3. Run the downloaded tool and follow the on-screen instructions.

This bypasses local components and runs troubleshooting directly from Microsoft’s servers.

8. Reinstall or Repair Windows Components via In-Place Upgrade

If none of the above methods fix the issue, performing an in-place Windows repair will restore all system files and components without deleting your data.

1. Download the Windows 11 Installation Assistant from Microsoft’s website.
2. Run the tool and choose Upgrade this PC now.
3. Follow the on-screen steps and keep the Keep personal files and apps option selected.

Once the upgrade completes, all system tools and troubleshooters should work normally.

9. Check for Windows Updates

Sometimes, this issue is caused by outdated Windows builds or broken components that are later fixed through updates.

1. Press Windows + I → Windows Update.
2. Click Check for updates.
3. Download and install any available updates.

Restart your computer afterward and test the troubleshooters again.

10. Create a New User Profile

If troubleshooters still fail to load, your user profile may be corrupted. Creating a new profile can confirm this.

1. Press Windows + I → Accounts → Other users.
2. Click Add account and follow the prompts.
3. Log in with the new account and try running a troubleshooter.

If it works on the new account, your previous user profile was damaged. You can migrate your data and use the new profile as your main account.

Wrapping Up

When you encounter the “An error occurred while loading the troubleshooter” message in Windows 11, it usually points to system or script file corruption.

Start with simple fixes like running SFC and DISM, checking script execution policies, or restarting WMI. If those don’t help, resetting diagnostics data or performing an in-place repair will almost always solve the issue.

Once fixed, you’ll be able to use Windows troubleshooters again to quickly diagnose and resolve other system problems with ease.