The process of downloading the 3Com? EtherLink? 10 PCI Fiber Network Interface Card 3C900B-FL(ST) v.5.4 driver should begin automatically after a few seconds. If this does not occur, click on one of the links below (we recommend downloading the 3Com? EtherLink? 10 PCI Fiber Network Interface Card 3C900B-FL(ST) v.5.4 driver from the primary server - this is the manufacturer’s 3COM 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 3Com? EtherLink? 10 PCI Fiber Network Interface Card 3C900B-FL(ST) v.5.4 diver.