My friends Winxp HE which is two months old will not start up now. When he last used it, it closed correctly, now, on start up he can get to the DOS screen with the options to Start Normally or Safe Mode etc. but cannot get any further. He cannot get to the Windows Safe mode screen, any ideas please? The last time he used it was to check Yahoo email, He uses ZA, Spybot, Avast.