Device Manager └── 📂 Ports (COM & LPT) └── 🔌 USB-Serial CH340 (COM11) ◄── Note this number 3. Software Configuration

: Browse and select the firmware file. If you are updating the entire system, ensure "Include Bootloader" is selected if necessary. : Click "Next" or "Start" and then power on the STB

Are you using a native serial port or a ?

: Allows users to dump their current firmware to the PC as a safety measure before attempting an upgrade.

Enables new encryption protocols. Improved User Interface: Smoother menu navigation. 🛑 Important Pre-requisites

Do not interrupt the process until the progress bar reaches 100% and displays "Upgrade Success." Troubleshooting Common Issues

If you meant this literally (looking for the actual tool or technical documentation for "STB Upgrade Tool ver 40.2"), let me know and I’ll help you search safely.