How to Fix Windows Error Code ERROR_106: Step-by-Step Troubleshooting Guide

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    If you’ve encountered Windows Error Code ERROR_106, you’re not alone. This error commonly appears during system updates, software installations, or when launching specific applications, causing disruptions that can be frustrating to manage. But don’t worry — in this detailed, easy-to-follow guide, we’ll walk you through every step to resolve this issue quickly and get your system back to smooth operation.

    What is Windows Error Code ERROR_106?

    Before diving into solutions, it’s helpful to understand what ERROR_106 generally indicates. This error often corresponds to a “Transport endpoint is already connected” message and usually relates to network or system conflicts, driver issues, or corrupted files interfering with the proper functioning of Windows or certain applications.

    Step-by-Step Guide To Fix Windows Error Code ERROR_106

    Step 1: Restart Your Computer

    Often the simplest solutions work best.

    • Why: Restarting clears temporary files and disconnects stuck processes that might cause error 106.

    • How: Click the Start menu > Select Power > Click Restart.

    • After reboot, try repeating the action that triggered the error.

    Step 2: Run Windows Update Troubleshooter

    Since ERROR_106 sometimes happens during updates, using the built-in troubleshooter can automatically fix common issues.

    • Open Settings (Windows + I)

    • Navigate to Update & Security > Troubleshoot

    • Select Additional troubleshooters

    • Click Windows Update > Run the troubleshooter

    • Follow the on-screen instructions to complete the process.

    • Restart your PC and check if the issue persists.

    Step 3: Check Network Connection and Reset Network Settings

    Network conflicts can trigger ERROR_106. Resetting network adapters often helps.

    • Open Command Prompt as Administrator:

      • Press Windows key + S, type cmd

      • Right-click Command Prompt, select Run as administrator

    • In the terminal, enter the following commands one by one, pressing Enter after each:

      netsh winsock reset
      netsh int ip reset
      ipconfig /release
      ipconfig /renew
      ipconfig /flushdns

    • Restart your computer and test the application or update again.

    Step 4: Update or Reinstall Problematic Drivers

    Drivers, especially for network adapters and system devices, can cause ERROR_106 if outdated or corrupted.

    • Press Windows key + X and select Device Manager

    • Expand categories like Network adapters, System devices, or the device related to the error.

    • Right-click the device and select Update driver > Search automatically for updated driver software

    • If no update is found or the problem persists:

      • Right-click the device > Uninstall device

      • Restart your PC to reinstall the driver automatically.

    Step 5: Perform System File Check (SFC) Scan

    Corrupted system files often cause unexpected Windows errors.

    • Open Command Prompt as Administrator.

    • Type the following and hit Enter:

      sfc /scannow

    • The scanning process may take 10-15 minutes.

    • Once complete, follow any on-screen recommendations.

    • Restart your computer.

    Step 6: Use DISM Tool to Repair Windows Image

    If SFC doesn’t fully resolve the error, the Deployment Image Servicing and Management (DISM) tool may help.

    • Open Command Prompt as Administrator.

    • Run these commands one at a time:

      DISM /Online /Cleanup-Image /CheckHealth
      DISM /Online /Cleanup-Image /ScanHealth
      DISM /Online /Cleanup-Image /RestoreHealth

    • Allow each command to complete, which may take some time.

    • Restart your device afterward.

    Step 7: Check and Repair Disk Errors

    Bad sectors or disk corruption might also contribute to ERROR_106.

    • Open Command Prompt as Administrator.

    • Execute:

      chkdsk C: /f /r /x

    • You’ll be asked if you want to schedule this check the next time the system restarts – type Y and press Enter.

    • Restart your computer, and the disk check will run.

    Step 8: Temporarily Disable Antivirus and Firewall

    Sometimes, third-party antivirus or firewall settings block connections or system operations, triggering ERROR_106.

    • Temporarily disable any third-party antivirus software.

    • To disable Windows Firewall:

      • Open Control Panel > System and Security > Windows Defender Firewall

      • Click Turn Windows Defender Firewall on or off on the left panel.

      • Select Turn off Windows Defender Firewall (not recommended permanently).

    • Test whether the error still occurs.

    • If fixing the issue, configure your antivirus/firewall to allow the affected application or update.

    Step 9: Perform a Clean Boot

    A clean boot starts Windows with minimal drivers and programs to help identify software conflicts.

    • Press Windows key + R, type msconfig, and press Enter.

    • Go to the Services tab.

    • Check Hide all Microsoft services.

    • Click Disable all.

    • Go to the Startup tab and click Open Task Manager.

    • Disable all startup items.

    • Close Task Manager and click OK on System Configuration.

    • Restart your computer.

    • See if ERROR_106 persists—if not, enable services/startup items one at a time to find the culprit.

    Step 10: Restore Windows to Earlier Point

    If all else fails, restoring your system can undo any harmful changes.

    • Press Windows key + S and type Create a restore point.

    • Click System Restore and follow prompts to choose a restore point dated before the error appeared.

    • Confirm and restore.

    Final Tips and Reminders

    • Backup your data regularly to avoid losing important files during troubleshooting.

    • Always download drivers and updates from official sources.

    • Keep your Windows OS updated to prevent compatibility issues.

    • If you’re uncomfortable performing any steps, consider consulting a professional technician.

    Wrapping Up

    Encountering Windows Error Code ERROR_106 might feel intimidating at first, but by following these steps carefully, you can often fix the problem yourself — quickly and safely. Remember, patience and systematic troubleshooting are key. If your issue persists after trying everything, don’t hesitate to reach out to Microsoft Support or a certified technician for further assistance.

    Did this guide help fix your Windows ERROR_106? Feel free to leave a comment below or share your experience with others facing the same issue! Sharing knowledge makes tech life easier for all of us. 😊

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    I hope this guide helps you resolve ERROR_106 smoothly. Let me know if you want me to create guides for other common Windows errors!

    Updated on June 17, 2025
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