Hi,
The "ACPI IRQ Holder for PCI IRQ Steering" is normal in Windows and I do not think it is the cause of your problem. There is no way in
any BIOS to change the IRQ "ACPI IRQ Holder for PCI IRQ Steering" is using because it is put there by Windows.
You now have three different threads open with lock up problems.
I will close this one and we will continue the discussion here:
http://www.mytechsupport.ca/index.php?option=com_smf&Itemid=42&topic=1065