I had this problem with an Abit KT7, upgraded mobo and it was fixed. In my case it was causing random BSOD's, you're lucky to just get the event. I had to "downgrade" from ACPI PC to Standard PC as a ...

Event Viewer, at times, shows that the ACPI BIOS is trying to write to an illegal PCI operation region. The Event ID 10 does not always crash your system, but it ...