It seems the NT bootloader for loading windows is missing.
maybe you can follow this instruction

1. Insert the Windows XP bootable CD into the computer.
2. When prompted to press any key to boot from the CD, press any key.
3. Once in the Windows XP setup menu press the "R" key to repair Windows.
4. Log into your Windows installation by pressing the "1" key and
pressing enter.
5. You will then be prompted for your administrator password, enter
that password.
6. Copy the below two files to the root
www.computerhope.com/jargon/r/root.htmdirectory of the
primary hard disk. In the below example we are copying these files
from the CD-ROM drive letter, which in this case is "e." This
letter may be different on your computer.

copy e:\i386\ntldr c:\
copy e:\i386\ntdetect.com c:\

7. Once both of these files have been successfully copied, remove the
CD from the computer and reboot.