This black screen is the disconnected screen without an error message and is caused by packet loss / something interfering with your network traffic. What exactly causes it is going to vary and range from something obvious, like a poor wireless signal, to something you might not expect, such as another game with anti-cheat software. It could potentially be caused by anything involved in your connection, or simply due to standard packet loss that you have no real control over, which could happen to anyone at some point. Do you know if there is a way to see which programs are using the internet? Sorry for asking this hehehe, I'm kinda newbie with this stuff.Why does this happen with Gw2 and not with other programs or games? It's the game a little weak at some conection or something?