> The BIOS is pre-OS, so that logo must be displayed by Windows. Your facts are right, but your conclusion is wrong, the bios is actually aware if the last booted OS did use smp or not. My quad cpu compaq report 3 of the cpus as failed if I reboot after using a non-smp kernel, or 2 failed if I last booted windows. I guess the same could happen on a p4 HT. - Sindre