Once the computer detects the device, click the (Start Downloading) in the tool. Release the boot key once the progress bar begins to move.

If your device is still functional and you simply want the latest official software, it is safer to use the built-in update feature: Nokia C1 Ta-1165 Ds 1Gb 16Gb Black - Dream2000

: Necessary for the computer to communicate with the device in "Download" or "Fastboot" mode. Download Sources

Click on the (Load Packet) located at the top-left corner of the interface.

: Use a reliable micro-USB data cable to maintain a stable connection.

If you have any questions about the process or run into a specific error, feel free to ask below.