Repair Windows XP by using the XP installation CD
Just wanted to share my new experience.
If your Windows XP fails to start due to an error corresponding to missing HAL.DLL, invalid Boot.ini or any other critical system boot files you can fix this by using the XP installation CD. Just boot from your XP Setup CD and enter the Recovery Console. Then run "attrib -H -R -S" on the C:\Boot.ini file and delete it. Run "Bootcfg /Rebuild" and then Fixboot