We believe that a third-party application interferes with the game. We have narrowed the list down to Google Chrome, and Windows Live Sign-In Assistant. Either close these applications, or kill their processes, before launching King of Dragon Pass. Make sure you don't have anything open in Chrome before closing it!
To kill the processes manually, open the Task Manager (Ctrl-Shift-Esc) and find these processes:
Right-click each of these processes, select "End process" and confirm.
If this doesn't work for you, please contact us. We are still investigating this issue and additional information is always helpful.