Never update firmware over Wi-Fi. A dropped signal during the process can brick your device. Use an Ethernet cable to connect your PC directly to the router.
Updates often include Wi-Fi driver enhancements for better stability and range. D-link Dsl-124 Firmware Update Download --BEST
Go to the Maintenance tab in your router settings to download a backup of your configuration in case you need to reset the router after the update. Step 3: Update the Firmware Never update firmware over Wi-Fi
Open a web browser and enter the default IP address: (or http://dlinkrouter.local ). D-link Dsl-124 Firmware Update Download --BEST