There is an error message under XP "Event Viewer" 4 and 5 : "AMLI: ACPI BIOS is attempting to read from an illegal IO port address (0x71), which lies in the 0x70 - 0x71 protected address range. This could lead to system instability. Please contact your system vendor for technical assistance." "AMLI: ACPI BIOS is attempting to write to an illegal IO port address (0x70)
Please update the latest BIOS to solve this problem.