Ive got XP x64 on 1 partition(C) and XP Pro on 2 other partitions( E and F) on the same drive. 3 OS's. It worked fine until the second reboot. Then when I try to boot into XP x64 I get "windows could not start because the following file is missing or corrupt <windows root>\system32\ntoskrnl.exe. Ive tried bootcfg /rebuild in Recovery Console and the same thing happens. I had the same setup on my last system with no problems. Ive even tried rewriting the boot.ini file with no luck. Ive re-installed x64 and the same thing happens.