-I think the ntoskrnl.exe file is corrupt or missing .
-To restore this file follow the below steps.
-Insert the Microsoft Windows XP CD. Note: If you have a recovery CD or a restore CD and not a Microsoft Windows XP CD it is likely the below steps will not resolve your issue.
Reboot the computer, as the computer is starting you should see a message to press any key to boot from the CD.
- When you see this message press any key.
-In the Microsoft Windows XP setup menu press the R key to enter the recovery console.
-Select the operating system you wish to fix, and then enter the administrator password.
-Type expand d:\i386\ntoskrnl.ex_ c:\windows\system32
-You will then be prompted if you wish to overwrite the file type Y and press enter to overwrite the file.
-Type exit to reboot the computer.