The process of downloading the ASRock Z87 OC Formula/ac BIOS 1.40 for DOS 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 Z87 OC Formula/ac BIOS 1.40 for DOS driver from the primary server - this is the manufacturer’s Asrock 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 Z87 OC Formula/ac BIOS 1.40 for DOS diver.