anything is particular proceed this problem, if not
Insert your Windows XP CD and reboot
hit the space bar when prompted to press any key to boot from the CD
Once in the Windows XP setup menu press the "R" key to repair Windows.
Log into your Windows installation by pressing the "1" key and pressing enter.
Since you have Windows XP Pro. you must enter the password you used when you installed
Copy the below two files to the root directory of the primary hard disk.
Assuming the your CD-ROM drive letter "D". (if different, use that letter)
copy d:\i386\ntldr c:\
copy d:\i386\ntdetect.com c:\
Remove CD and reboot