A KINDLY GEEK has produced a free tool to resurrect AMD machines borked by installing Service Pack 3 for Windows XP.
The fault affects mainly HP machines with an OEM splash screen and a number of Asus mobos, to which XP refuses to talk on the grounds that they're not fully ACPI compliant.
Jesper, over at msinfluentials, has a handy tool you can get your hands on for nothing which is said to fix the problem. Not having tried it ourselves, we cannot say for sure if it works or not, but if you've got a dead AMD system, whaddya got to lose?
Jesper warns against putting his tool in an Intel system, because it'll break it.