It's exited preboot before the flash has been initiated by Updater.exe. Things to try: Modern devices have very short time before they exit preboot, you need to instantly hit 'OK' on Updater's GUI or hit Enter key on your PC kb. Use a rear PC port without a hub, try other USB cables because some aren't suitable. Have device completely OFF, not in standby and power it on by plugging in USB cable with Updater GUI already open ready to flash. Be very quick.

What you can do in preboot you can also do by flashing from SD using text commands btw.