The process of downloading the Pioneer DVDU04S firmware 1.03u driver should begin automatically after a few seconds. If this does not occur, click on one of the links below (we recommend downloading the Pioneer DVDU04S firmware 1.03u driver from the primary server - this is the manufacturer’s Pioneer 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 Pioneer DVDU04S firmware 1.03u diver.