My device manager shows an error on the PCI Simple Communications Controller. I tried to update the driver but nothing happens. Version that I downloaded again from http://www.driverscape.com/download/pci-simple-communications-controller is 126.96.36.1990. But when I go to install it shows an error that one or more drivers cannot be installed. I tried uninstalling the previous PCI controller but it cannot get uninstalled. I use Windows 7-64 bit. Please help me.