If u have CDXP, try with recovery console by using command:
1.Recovery Console. If you have an "installation" CD (not restore/recovery discs), you should check the integrity of the file system.
Boot to "Recovery Console" from the Windows XP Install CD. When the "Welcome to Setup" screen appears, press <R> key to start the Recovery Console.
You'll be asked to enter the "number" of the Windows installation you wish to repair (usually "1"), then the "Administrator" password, if one was set. If you never assigned a password, just hit <Enter> key.
Use the "chkdsk" command to verify the integrity of your file system and automatically attempt to fix errors found. Use the following syntax: "chkdsk /p /r". If you've followed the instructions, you don't need to enter a drive letter because you should be on the correct volume.
Depending upon the size of your partition, these checks could take a long time. Let them run to completion without interruption. The chkdsk utility was not designed to be interrupted - so don't. Doing so might corrupt the file system.
The "exit" command is used to quit Recovery Console and
2.fixboot
if not ok try repair your windows with your CDXP.