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Event ID: 5 Source: ACPI
AMLI: ACPI BIOS is attempting to write to an illegal IO port address (0xcf8), which lies in the 0xcf8 - 0xcff protected address range. This could lead to system instability.
|English: Request a translation of the event description in plain English.|
|Concepts to understand:|
What is ACPI?
What is an I/O port?
I resolved this issue by flashing my BIOS. Upon successful flash, the error ended.
As per Microsoft: "The system BIOS attempted to incorrectly access hardware resources concurrently with the operating system. This type of access cannot be synchronized and can cause system instability". See MSW2KDB for additional information about this event.
To resolve this issue, contact your computer manufacturer or the BIOS vendor for possible updates to your computer BIOS. See ME317513 for more details.
From a newsgroup post: "Your problem is likely because you have on board USB enabled......Via's usb implementation is quite faulty. Solution: Get a Pci usb adapter, turn off via on board usb and your difficulties will disappear."
From another post: "According to MS this happens when you have a BIOS which is not 100% ACPI compliant. Obtain the latest firmware for your motherboard."
See also the link below.
Please see ME283649.
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|Links: I/O Ports Blocked from BIOS AML on Windows XP|
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