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How to Fix Windows ERROR_111: Step-by-Step Troubleshooting Guide


If you’ve encountered Windows ERROR_111, you’re likely facing a frustrating roadblock that can hinder your system’s performance or the functionality of certain applications. Don’t worry — this guide will walk you through detailed, easy-to-follow steps to troubleshoot and fix ERROR_111 efficiently.


What is Windows ERROR_111?

ERROR_111 in Windows typically relates to the “Connection Refused” error. It occurs when a client attempts to connect to a server or service, but the connection request is denied or blocked. This can happen due to various reasons such as misconfigured firewall settings, issues with network connectivity, or services not running on the target machine.


Why Fixing ERROR_111 is Important?

If left unresolved, ERROR_111 can prevent essential programs from communicating over the network, disrupt file sharing, or even stop you from accessing the internet or necessary resources. Fixing it promptly restores your system’s smooth operation and productivity.


Step-by-Step Guide to Fix Windows ERROR_111

Step 1: Verify Network Connectivity

The first step is to ensure your computer is properly connected to the network.

  • Check physical connections: Make sure Ethernet cables or Wi-Fi is connected and working.
  • Ping the server or IP address:

    • Open Command Prompt by pressing Windows + R, type cmd, and hit Enter.
    • Type ping [server IP or hostname] (e.g., ping 192.168.1.1), press Enter.
    • If you get replies, your network connection is active. If it times out, there might be a network issue you need to address.

Step 2: Confirm Target Service is Running

The connection refusal often means the service you’re trying to connect to isn’t running.

  • Open Services:

    • Press Windows + R, type services.msc and hit Enter.
    • Look for the relevant service (e.g., Apache, MySQL, or any custom service).
    • If it’s stopped, right-click and select Start.
    • Set it to Automatic to ensure it starts on boot.

Step 3: Check Firewall Settings

Often, the Windows Defender Firewall or third-party firewall might block the connection.

  • Open Windows Security from the Start menu.
  • Click on Firewall & network protection.
  • Select Allow an app through firewall.
  • Click Change settings, then find and enable the app or service you’re working with.
  • Alternatively, create an Inbound Rule to allow connections on the specific port used by the application:

    • Go to Advanced settings in Firewall.
    • Click Inbound Rules > New Rule.
    • Choose Port, specify the port number, click Allow the connection, and complete the wizard.

Step 4: Examine TCP/IP and Network Stack

Corrupted network stack components may cause connection refusal.

  • Open Command Prompt as Administrator (search for cmd, right-click, Run as administrator).
  • Run these commands one by one, pressing Enter after each:

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

  • Restart your computer.

Step 5: Verify Target Server’s Listening Ports

If the service is running but the port isn’t open, connection attempts are refused.

  • In Command Prompt, run:

    netstat -an | find "LISTEN"

  • This shows all listening ports. Confirm the expected port is listed.

  • If you suspect the port is blocked by your router or ISP, try changing the port or check your router’s firewall settings.

Step 6: Temporarily Disable Antivirus Software

Sometimes antivirus software can block connections mistakenly.

  • Temporarily disable your antivirus.
  • Try reconnecting.
  • If the connection works, configure the antivirus to whitelist the application or port.

Step 7: Check Hosts File for Incorrect Entries

Incorrect entries in the hosts file can redirect or block connections.

  • Navigate to: C:\Windows\System32\drivers\etc\hosts.
  • Open the file with Notepad as Administrator.
  • Look for any lines that may block or redirect the IP/hostname you’re trying to access and remove or comment them out by putting a # at the start of the line.
  • Save and close the file.

Step 8: Inspect Application-Specific Settings

Some applications have their own network or proxy settings that might restrict connection.

  • Open your application’s network settings.
  • Make sure proxy or connection settings are correctly configured or disabled if not needed.
  • Reattempt connection.


Additional Tips to Prevent Windows ERROR_111

  • Regularly update your Windows OS and installed applications.
  • Keep your firewall and antivirus updated and configure properly.
  • Avoid using unofficial or pirated software that may contain malware altering network configurations.
  • Regularly back up your system before making any major network changes.


Conclusion

Though Windows ERROR_111 can be a headache, following these steps methodically will help you identify and resolve the root cause. Start by verifying your network and service status, then adjust firewall settings, reset your network configuration, and check for software conflicts. With patience and care, you’ll fix the problem and get your connections running smoothly once again.


If you found this guide helpful, please share it with others who might be struggling with the same issue! And remember, when in doubt, don’t hesitate to reach out to professional tech support.


Need personalized help? Let me know your specific setup or error details, and I can guide you further.

Updated on June 17, 2025
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