Have anyone met this problem? I have installed XP and Longhorn in my PC, and now the startup option of longhorn is missing? What can I do if I want to renovate this problem. My boot.ini now is [boot loader] timeout=5 default=multi(0)disk(0)rdisk(0)partition(1)\WINDOWS [operating systems] multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional (bootscreen)" /noexecute=optin /fastdetect /KERNEL=kernel1.exe multi(0)disk(0)rdisk(0)partition(1)\WINDOWS="Microsoft Windows XP Professional" /noexecute=optin /fastdetect What should I add Longhorn startup option into it. By the way, Longhorn system is on the D driver. I'll appreciate anyone who reply to my problem no matter available or not?