Problem: The application was unable to start correctly (0xc0000005) Disable DEP (Data Execution Prevention), instructions for that are here: https://www.addictivetips.com/windo...n-dep-and-how-to-disable-it-in-windows-vista/ Problem: Host error : disconnected or C++ Runtime error when loading dungeons Make sure that the multicore option is not enabled and that there is an exception for Vindictus on your firewall. Reinstall the client if there are still problems. Problem: Failed to log in This message will stop appearing after some time, reinstalling the client will reduce the chance of it appearing. Problem: (Launcher) The remote server returned an error: 500 Internal Server Error Make sure that your username and password does not contain any special characters. You can change the password on the account panel on the website. Problem: (Launcher) System.Net.Sockets.SocketException: An attempt was made to access a socket in a way forbidden by its access permissions Turn off your firewall or add an exception for the Launcher to the outbound list in Windows Firewall.