Fix: COD Vanguard Duhok-Guernsey - Not Signed in to a Profile - MiniTool

Call of Duty: Vanguard, while a popular title, sometimes throws players a curveball in the form of the "Duhok-Guernsey" error. This frustrating issue, typically appearing as "Vanguard Error Code Duhok-Guernsey – Not signed in to a profile," prevents game launch and account verification. This guide offers several troubleshooting steps to resolve this connection problem.

Understanding Duhok-Guernsey

Contrary to initial assumptions, the Duhok-Guernsey error isn't solely caused by server or internet outages. While network issues on your end can contribute, the error's root often lies in the game's Ranked Mode implementation. The problem can manifest when attempting to access Vanguard or Warzone.

Solutions for Duhok-Guernsey

Here are five methods to try, working your way down the list until the issue is resolved:

1. Reboot Your System and Network:

The simplest solution is often the most effective. Restart your PC, console, and router. Power cycle each device (unplug, wait 10 seconds, plug back in) to ensure a clean reboot.

2. Change Your DNS Server:

Switching to a different DNS server can improve network connectivity. Here's how for various platforms:

• PC (Windows):

  1. Open Settings (Windows key I).
  2. Navigate to Network & Internet > Ethernet > Change adapter options.
  3. Right-click your network, select Properties, then Internet Protocol Version 4 (TCP/IPv4) > Properties.
  4. Select "Use the following DNS server addresses" and enter Google's public DNS: 8.8.8.8 and 8.8.4.4.

• PS5:

  1. Go to Settings > Network > Settings.
  2. Select Set Up Internet Connection > Set Up Manually > Wi-Fi or LAN.
  3. Under DNS Settings, enter 8.8.8.8 (Primary) and 8.8.4.4 (Secondary).

• Xbox:

  1. Press the Guide button > All Settings > Network > Network settings.
  2. Go to Advanced settings > DNS Settings > Manual.
  3. Input 8.8.8.8 and 8.8.4.4 as Primary and Secondary DNS addresses. Restart your console.

3. Adjust MTU Settings (PS5 Only):

Incorrect MTU settings can impact network speed. On your PS5:

<code>1. Open Settings > Network.
2. Go to Set Up Internet Connection.
3. Choose your connection and select MTU Settings.
4. Set the value to 1473.</code>

4. Try a Different Internet Service Provider (ISP):

If possible, temporarily use a different internet connection (e.g., a mobile hotspot) to see if the issue is ISP-related.

5. Reinstall COD Vanguard:

As a last resort, uninstall COD Vanguard through your system's control panel or equivalent. Then, download and reinstall the game from the official website.

Conclusion

These five methods provide a comprehensive approach to resolving the Duhok-Guernsey error in Call of Duty: Vanguard. If you've found other successful solutions, please share them in the comments!

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