Take a moment to learn what kind of video card you have.
Follow these steps to ensure you have the latest updates: The first step to solving many problems involves checking and upgrading your graphics card drivers. Note that some Windows 10 installations do not install DirectX 9 automatically, which means you'll need to do so yourself before playing the game. This is an error message most commonly associated with outdated graphics card or DirectX 9 drivers. I receive an “Unable to initialize 3D output” error when launching the game.
Download the DirectX 9.0c (latest) drivers here: DirectX End-User Runtime Web Installer.
Note that this is the only version required to play the game, which means it will need to be downloaded and installed regardless of any other versions you're currently running-including DirectX 11 or 12. Players diving into Guild Wars 2 on the Windows OS will need the latest version of DirectX 9 to play the game.