This is a different William with a similar problem
My XP Pro won't boot. It gives me a "no O/S" error message. If I put the XP installation CD in and ignore the prompt to boot from CD, the system boots and runs normally. I tried running the recovery console to fix the MBR (which I'm guessing is the problem) but get prompted for the administrator password. To the best of my recollection, I never set this password. I have tried all my common passwords, including "admin" and others, but I can't get the right password. Since I can get the system to run, I have gotten all the data saved elsewhere.
I would like to resolve this problem without losing all the settings, programs etc. through fdisk (wait... this is NTFS) so I hope someone can point me in the right direction.. If not, tell me the "nuke & pave" way to do it!