How to Solve: ‘Connection Error Detected’ in Guild Wars 2

Guild Wars 2 is a massively multiplayer online role-playing game developed by ArenaNet and published by NCSoft and ArenaNet. The game is set in the fantasy world of Tyria. The game is about the rebirth of Destiny`s Edge, a disbanded guild dedicated to fighting the Elder Dragons, a Lovecraftian species that took over Tyria after the first Guild Wars. The game is set in a persistent world with a story that develops through instanced environments.

You may have trouble connecting to the Guild Wars 2 servers. Users have been receiving error messages such as “Connection Error Detected. The “Connection Error Detected” problem occurs when Windows users try to open Guild Wars Launcher in normal or recovery mode. The problem has been detected on Windows 7, Windows 8.1, and Windows 10.

What is the Cause of the “Connection Error Detected” Message in Guild Wars 2?

Firewall failure: These two ports (80 and 443) may be blocked by your firewall. If this scenario applies, you can configure whitelisting rules specifically for these two ports or remove the third-party package that is causing the problem.

Ports 80 and 443 are blocked: This set basically relies on the 2 main ports to communicate with the mega server. If these two items are not open, expect this error to appear every time you try to get the latest version of the game. In this case, you can solve the problem by enabling UPnP or by manually punching the 2 ports you need.

Guild Wars 2 installer is blocked: If you have downloaded a modified version of Guild Wars 2, it is possible that the executable is blocked, which is why Windows refuses to give it all the permissions. If you see this error message when trying to install the game, check if the executable is really locked (and if so, unlock it).

Corrupted game cache: Under certain circumstances, this problem can occur due to corrupted data in the Guild Wars 2 cache folder. In this case, you can use File Explorer to access this folder and delete its contents to resolve the problem.

DNS mismatch: As some affected users have confirmed, this problem can also be caused by a mismatch in your DNS (Domain Name System). In this case, you can solve the problem by deleting your current DNS or switching to Google DNS.

How to Repair “Connection Error Detected” in Guild Wars 2

Allow access to the firewall program and exclude Guild Wars 2 in the antivirus program

You may not be able to connect to Guild Wars 2 servers because your system’s security software is denying you access to the game’s network. This problem occurs mainly because these programs consider the game suspicious. You can exclude the game in your third-party antivirus program, and add assetcdn.101.ArenaNetworks.com to your firewall’s list of accepted connections and see if that solves the problem.

Make sure you are connected to the internet

Since this error is network-related, you need to make sure that your computer is connected to a network with reliable Internet access.

Frequently Asked Questions

  1. Make sure that you are using a supported connection (Guild Wars 2 requires at least a broadband connection to work properly).
  2. Reboot your router and modem.
  3. Reboot your computer.
  4. Temporarily bypass all routers, hubs, or switches and try connecting directly to the modem.

  1. Find the file Gw2.exe.
  2. Right-click on the file and select Create shortcut.
  3. Rename this new shortcut to Guild Wars 2 Repair.
  4. Right-click on Guild Wars 2 Repair and select Properties.
  5. Find the Target line and add -repair to the end. (Example: "C:\Games\Guild Wars 2\gw2.exe" -repair)
  6. Click the OK button.

Yes. Sometimes this means that some content becomes inaccessible to play - for example, I couldn't access LA for a few minutes during the last patch because it was still loading/installing. Now that they've finally enabled the revised streaming capabilities in the client, it's finally working.

  1. Upgrade your account in the in-game gem store.
  2. Log in to Guild Wars 2 with the account you want to upgrade.
  3. If you are playing with a free account, click the "Upgrade to a full account" button in the upper left corner of the screen.
  4. Select the version of the game you want to purchase.

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