You can disable the PCI steering in Device Mangager->System Devices->PCI
Bus->IRQ Steering tab. The MS Knowledge base has a good article on this.
Sorry, I don't know the number.

Karl Gottshalk

>there is one other device using the same IRQ: IRQ holder for PCI steering.
> Does anyone know what this is, and would it be causing the conflict?
> I changed the network card's IRQ (through the BIOS, as it is an
>'auto-detect' card and won't let me change its settings through Device
>Manager), and every time I did, this other device changed to the same IRQ.
I
>tried 9, 10, 11, and 12, and both were always on the same one. I tried
>removing the IRQ holder, disabling it, and it still doesn't solve the
>problem. I moved the network card to a different slot, no change.

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