Please guide what can i do now

Please see if the instructions in *support.microsoft.com/kb/314477 helps you out...

Arun

EDIT: If it doesnt work, please inform OS, Service Pack details, any recent activity that might have triggered the problem, etc...

Another issue??? Thanks for it to be different
Perfect solution,
Boot using Windows Setup CD and enter into "Recovery Console" by pressing "R". Now Log into windows installation and enter admin password. Now give following commands at prompt:

Attrib -H -R -S C:\Boot.ini
Del C:\Boot.ini
BootCfg /Rebuild
Fixboot

problem not solved.i done every thing like fixmbr and rebuild mbr too.but same problem appears.i think its motherboards fault.please guide could it be motherboard?

Nope its nt mobo prblm. Some imp files of XP r missing. A re-installation will make it alright. Or if u dnt wanna re-install then try the page sakumar79 suggested and commands suggested by dreams.

And at last try fixmbr and fixboot command.

AFAIK fixmbr would be of no use.

just replace the .dll file from xp cd or download this and use a linux distro
to copy the file

No way i tried all things but useless,is there any person who can able to consult on this matter.

use this

*pcsupport.about.com/od/fixtheproblem/ht/restorehaldll.htm

already done no success

then reinstall xp

CA50 said:

then reinstall xp

Click to expand...

that's the problem man,that i can not able to install xp(first read then reply)