The process of downloading the Asrock H77 Pro4-M Realtek HD Audio Driver 2.66 driver should begin automatically after a few seconds. If this does not occur, click on one of the links below (we recommend downloading the Asrock H77 Pro4-M Realtek HD Audio Driver 2.66 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 Asrock H77 Pro4-M Realtek HD Audio Driver 2.66 diver.