Conflicting PCI devices in Windows 2000/XP
Help! all the PCI devices in my Windows 2000/XP PC are conflicting with the same IRQ!
On ACPI compliant motherboards with Windows 2000/XP installed, PCI devices will be re-enumerated by the operating system so that they share the same IRQ (usually IRQ9 or sometimes IRQ11). This is completely normal operation and has been intentionally designed into the Windows 2000 and XP operating systems.
DON'T PANIC! The P-Series driver has been designed to be able to share it's IRQ as defined by Microsoft in the Windows 2000 DDK. (Driver Development Kit). There is no problem with this configuration.
For more information please see the Microsoft Knowledge Base article at: