"The IOAPIC Enable BIOS feature is used to enable or disable the motherboard's APIC (Advanced Programmable Interrupt Controller). The APIC is a new distributed set of devices that make up an interrupt controller. In current implementations, it consists of three parts - a local APIC, an I/O APIC and an APIC bus.
The local APIC delivers interrupts to a specific processor so each processor in a system has to have its own local APIC. Therefore, a dual processor system must have two local APICs. Because a local APIC has been integrated into every processor since the debut of the original Intel Pentium P54C processor, there's no need to worry about the number of local APICs..."
You do software updates to get the most from favourite programs right? Updating a motherboard BIOS can in a timely manner is also critical. The guide to Flashing a Motherboard BIOS spells out the often complicated steps in plain english. PCSTATS Tips