First ensure your video card has the latest drivers installed. If the problem persists, update your DirectX version. Even when your PC has a DirectX 9c or newer version installed, it might still need the latest DirectX updates. Search for DirectX Web Installer on Microsoft website to get the latest updates.

Please update your DirectX version. Even when your PC has a DirectX 9c or newer version installed, it might still need the latest DirectX updates. Search for DirectX Web Installer on Microsoft website to get the latest updates. It is also recommended to update your Windows (Windows Update website) since it has been reported updates fix audio issues.

A Signature is the visual representation of your spaceship. It doesn't change gameplay, only the spaceship's graphics. You can find Signatures on this website.