If you still wish to use the Firewire port built into the motherboard - you do not need to turn it off in the BIOS. Rather, go to Control Panel\Device Manager and right click on IEEE 1394 Bus host controllers and select Properties. Select the Power Management tab and click in the tickbox adjacent to Allow the computer to turn off this device to save power, to turn this feature on. This worked perfectly for me - while still allowing the use of the firewire port. Thanks to Lapino for giving the original suggestion about the BIOS. This is just an alternative.