First you need to launch a web browser and enter 192.168.2.1 in the address bar. Then press enter. Next click login at the top right corner of the page. Enter the password and click Firmware update on the utilities section. Now, click browse and then locate and select the firmware file that you downloaded for belkin firmware update. After selecting the firmware file, you need to click Update. Click OK next and then follow the on-screen instructions for further update process.
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https://connectrouter.com/how-to-update-belkin-router-firmware/