TightVNC for Windows: Installation and Getting Started ...
www.tightvnc.com › doc › winThe passwords for TightVNC Server in a service mode are set similarly using its own control interface (click the TightVNC Service tray icon). If you want to set passwords for TightVNC Service while it is not running, use Offline Configuration (Start->Programs->TightVNC->TightVNC Server (Service Mode)->TightVNC Service – Offline Configuration).