Solve the problem of NTLDR loss

I installed the dual system of Windows 98 and Windows XP, today the system can not boot normally, pop up "NTLDR is missing…" information, how to solve?
NTLDR is Windows XP startup An important boot file. The above message indicates that the file has been lost in your computer. You can copy it directly from the C drive in the same version of the system or directly extract it from the Windows XP installation CD and store it in your C drive. If you are afraid of trouble, directly repairing and installing Windows XP can also solve the problem.
Tip: NTLDR is a dual system boot file, such as Windows 2000 and Windows XP need this file, the easiest way to solve is to copy a copy is OK.