have you ever experince this kind of problem?
when this problem happen your PC cannot log in into WindowsXP. All you have to do is get your WindowsXP installation cd and follow this steps:
1. Boot your computer using that cd
2.At WindowsXp Setup menu , press R (repair windows)
3.You log on to windows installation and ask for admin password. Just type in your admin password and press Enter
4. type these following command :
x:i386ntldr c:
x:i386ntdetect.com c:
5. Above command are copying file from your WindowsXP cd into your drive C:, after that reboot your computer.
x is your CD-ROM / DVD-ROM.
eg.
E:i386ntldr c:
E:i386ntdetect.com c: