Fixing "Starting BattlEye Service..." stuck

My BE Launcher is stuck at "Starting BattlEye Service..." stopping my game from launching.

Something on your system prevents the BE Service from functioning properly. Please check this FAQ entry regarding BE Service installation/startup failures for solutions: When launching the game I get a "Failed to install BattlEye Service." / "BattlEye Service installation failed." / "Failed to start BattlEye Service." / "BattlEye Service startup failed." / "Failed to initialize BattlEye Service: ..." error.

This answer is copied from BE's FAQ and slightly adapted to be Unturned-specific. Click here to visit the BE support page.