The process of downloading the Asus RT-N66U Wireless Router Firmware 3.0.0.3.90 driver should begin automatically after a few seconds. If this does not occur, click on one of the links below (we recommend downloading the Asus RT-N66U Wireless Router Firmware 3.0.0.3.90 driver from the primary server - this is the manufacturer’s Asus official website). If the download still fails to run, check whether your anti-virus software is not blocking the connection to the manufacturer server of the Asus RT-N66U Wireless Router Firmware 3.0.0.3.90 diver.