Hi, I was just having trouble getting my Control panel to open, so I checked event viewer to see if the cause was there and instead found that I have a very commonly reoccuring event. The event itself states that: "IRQARB: ACPI BIOS does not contain an IRQ for the device in PCI slot 24, function 0." We just got this computer so I did not add anything new recently, so I am not sure on what to do to fix this as I am new to Vista. Any suggestions? Also, I have attached the full text of the event item if that helps. Thanks for the help.