Re: windows 7 and onboard usb/firewire conflicts
That is an odd issue. The only thing I can think of would be that they're being assigned the same I/O address, but this should cause the system to completely crash... not disable one at a time. I would unplug all the devices, then plug one in at a time, booting between each so it starts to assign I/O addresses.
Humans are the only creatures that won't live up to the their potential. Give everything your all. When you die, die on E.
So I ask you, what do you intend to do now?