According to this report, HP is working with Microsoft to fix problems people are having with Windows XP SP3. It seems that AMD based PCs are stuck endless rebooting because, after the update is applied, these PCs look for an Intel drive at boot up (which isn't there) causing the endless boot cycle.
The main problem, as Johansson and others see it, happened because HP, and possibly other OEMs, used the same images for AMD-based PCs that were used with Intel-based hardware. The result for customers with those AMD machines when the SP3 service pack was applied turned out to be a number of problems, including endless rebooting.
[H]ard|OCP - www.hardocp.com
[H]ard|OCP - www.hardocp.com
