While the Host runs an install, the dialog's close control was disabled. It now asks the Host to stop the run, the same request as Cancel install, and closes the dialog once the Host confirms the stop; when the Host answers too late or cannot confirm, the dialog stays with that word. Escape and the mask keep waiting while the Host owns the operation. The control is labelled 取消安装并关闭 / Cancel install and close while it does this.