Blue screen - restarting

Hello,
Recently, my Window XP Notebook keeps restarting. When I turn it on, before i can type my password to log into my account, the screen turns blue for a second and says : A fatal error has occured. Windows has been shut down to protect your files. Then, it restarts and repeats the entire process.
I tried going into Safe mode when Windows starts up but it still restarts and I can't log in. I have also tried Last Known Good Configuration, Safe mode with Networking, Safe mode with Command Prompt, Start Windows Normally and Reboot but it still does not work.
Please advice me on what to do next. (Should I try "Disable auto-restart when system fails" ?)
Thank you.