After the upgrade completes, the box will reboot. You will see a factory reset screen. Do not panic. This is normal.
Warning: This is critical. A wrong or interrupted firmware update can permanently brick your device. Unlike a PC, these cheap receivers often lack a recovery mode. 1509 Dvb-t2 512m Firmware Update
Summary
Conclusion
If you want, I can: 1) list exact steps tailored to your device model if you provide the model/boot log, or 2) review a firmware package (filename, checksums) and note any red flags. After the upgrade completes, the box will reboot