The process of downloading the Arduino Mega 2560 USB Driver 1.1.1.0 for Windows 8.1 driver should begin automatically after a few seconds. If this does not occur, click on one of the links below (we recommend downloading the Arduino Mega 2560 USB Driver 1.1.1.0 for Windows 8.1 driver from the primary server - this is the manufacturer’s Others 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 Arduino Mega 2560 USB Driver 1.1.1.0 for Windows 8.1 diver.