A friend had a Prescott CPU burn out and I'm replacing the CPU for him. Since it's a moderately old system (2.5 years) he doesn't want to spend the bucks for a new 3.0G P-IV, so we've replaced it with a Celeron (works fine for his needs). The system's working fine -- but it shows an ACPI Multiprocessor HAL (a remnant of the hyperthreading P-IV). He has a LOT of "stuff" installed; and it's not a simple matter to do a repair install, as his XP CD is an original pre-SP CD, which will refuse to install on an SP2 system. I suppose I could just leave well enough alone -- but I'd like to get the HAL correct if possible.
So I need to change the HAL from a "ACPI Multiprocessor PC" to a "ACPI Uniprocessor PC"
Microsoft site insists this requires a re-install, but some have indicated successfully doing this by replacing three files ==> just looking for confirmation from others who have made this change.