When I view "Resources by connection" in the Device Manager, everything is on it's own IRQ except the following
(PCI) 21 Standard Enhanced PCI to USB Host Controller
(PCI) 21 Via Rev 5 or later USB Universal Host Controller
(PCI) 21 Via Rev 5 or later USB Universal Host Controller
(PCI) 21 Via Rev 5 or later USB Universal Host Controller
(PCI) 21 Via Rev 5 or later USB Universal Host Controller
I had some trouble with both the USB controller and the LAN controller when I installed Windows.
I had to use the Via all-in-ones to search for the drivers.
I have no idea why the same thing would be in there so many times.