How to fix “The network location cannot be reached. For information about network troubleshooting see Windows Help. [ERROR_NETWORK_UNREACHABLE (0x4CF)]” – Error Code 1231


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Error Code 1231

Error code Error Code 1231 is a common Windows issue that typically arises from “The network location cannot be reached. For information about network troubleshooting see Windows Help. [ERROR_NETWORK_UNREACHABLE (0x4CF)]”.

Overview

This article addresses the error “The network location cannot be reached. For information about network troubleshooting see Windows Help. [ERROR_NETWORK_UNREACHABLE (0x4CF)]”, known as Error Code 1231. We will explore its causes and provide effective solutions to resolve it.

Identifying the Problem

Error Code 1231 typically occurs when:

  • A server or network resource cannot be located
  • Network configuration issues prevent communication
  • Firewall or antivirus settings are blocking connections

Common Fixes

1. Check Network Connections

  • Ensure that all cables, routers, and devices are properly connected and powered.
  • Try using a different Ethernet cable or Wi-Fi network.

2. Reset TCP/IP

  • Open Command Prompt as administrator.
  • Enter the following commands:
    netsh int ip reset
    netsh winsock reset
  • Restart your PC.

3. Disable Firewall and Antivirus

  • Temporarily disable your firewall and antivirus software.
  • Retest the network connection.
  • If the issue resolves, re-enable the software and configure exceptions for the necessary network locations.

4. Update Network Adapter Drivers

  • Open Device Manager.
  • Expand “Network adapters”.
  • Right-click on your network adapter and select “Update driver”.
  • Restart your PC after updating.

Advanced Troubleshooting

1. Run Network Troubleshooter

  • Go to “Settings” > “Network & Internet” > “Status”.
  • Click on “Network troubleshooter” and follow the instructions.

2. Modify Registry Settings

  • Open Registry Editor (regedit).
  • Navigate to:
    HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
  • Create a new DWORD value named “EnableAggressiveKeepAlive”.
  • Set the value to 1.
  • Restart your PC.

3. Disable IPv6

  • Open Control Panel > Network and Internet > Network Connections.
  • Right-click on your network adapter and select “Properties”.
  • Uncheck “Internet Protocol Version 6 (TCP/IPv6)”.
  • Restart your PC.

Conclusion

Error Code 1231 can be resolved using the solutions outlined in this article. Remember to restart your computer after making changes to network settings. To prevent the error in the future:

  • Keep network drivers updated.
  • Configure exceptions in firewall and antivirus software.
  • Regularly check network connections.