Open (Ctrl + Alt + Del) and ensure natspeak.exe is not running. Open Command Prompt as an administrator.
your Dragon installation media or downloaded setup files. dragon failed to launch 64 bit server
If by "dragon" you mean (a modern Redis-compatible in-memory database), this error usually indicates: Open (Ctrl + Alt + Del) and ensure natspeak
Dragon Raja is a heavy game. If you only give the emulator 1 CPU core and 1GB of RAM, the 64-bit server process will fail to launch. dragon failed to launch 64 bit server