Boot-up problem. Hello.....i would like to share my problem with windows xp sp2 home edition. Hope

Question

Hello.....i would like to share my problem with windows xp sp2 home edition. Hope you could help me. The problem started when my laptop suddenly turned off then suddenly restarted by itself for a few seconds. Then the window showed choices if i will start windows with safe mode, normally, previous configuration....ect. But any choice i will choose it always return me on the same window of selecting choices....meaning windows cannot boot-up.......how can i restore my laptop on its original function.....??? Thanks in advance