DRIVER NEEDED: Award Award Modular BIOS v4.51PG (Windows XP Professional)

I have just upgraded my parent's PC from Windows 98 to Windows XP (SP2). Since the upgrade, they have been experiencing instability issues with the PC rebooting periodically. The event log refers to "ACPI BIOS attempting to read/write from an illegal IO port". I am hoping that an upgrade to the BIOS will sort out their problems. The details of the current BIOS are:
BIOS Date: 06/30/00

BIOS Type: Award Modular BIOS v4.51PG

BIOS ID: 06/30/2000-693-596-W977E-eV693A

OEM Sign-On: eV693A-A Ver 1.3 06/30/2000

Chipset: VIA 82C691 rev 68

CPU: Pentium III 800 Mhz
I appreciate that this site may already offer a suitable BIOS but I don't know which one to pick. Can anybody please tell me where I might get hold of a newer version of the BIOS for this motherboard, something more compatible with XP?
Many thanks,

Martin





Support Information:
Device Type: BIOS / Motherboard
Manufacturer: Award
Model: Award Modular BIOS v4.51PG
Interface: Other
Operating System: Windows XP Professional
Age of Device: Not specified
FCCID:

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