I am using Windows XP and Mainboard: Microstar MSI K7T Pro MS-6330, BIOS ver. 2.9 from 08.03.2001  Im having this error everytime I boot up in the system events log even though I think that all my BIOS Power Management settings is fine.  ACPI BIOS currently cannot support Windows XP?  VIA KT133 chipset bugs in the ACPI implementation?  Can anyone tell me how to figure out this problem?  Event Type: Error  Event Source: ACPI  Event Category: None  Event ID: 4  Date: 2001-09-03  Time: 1:55PM  User: N/A  Computer: LAKI-Z1CY875KD  Description:  AMLI: ACPI BIOS is attempting to read from an illegal IO port address (0xcfc), which lies in the 0xcf8 - 0xcff protected address range. This could lead to system instability. Please contact your system vendor for technical assistance.  Data:  0000: 00 00 00 00 04 00 52 00 ......R.  0008: 00 00 00 00 04 00 05 c0 .......À  0010: 00 00 00 00 00 00 00 00 ........  0018: 00 00 00 00 00 00 00 00 ........  0020: 00 00 00 00 00 00 00 00 ........  Do you know what's wrong with it?  Thankyou  Peter