Why won't windows start up?

My laptop starts up normal with the q and then goes to a screen that list different start up options (1.safe mode 2.safe mode with networking 3.safe mode with command prompt 4.last known good configuration (your most recent settings that worked) 5.start windows normally) I tried all of them. The first three just spam the screen with many lines of codes, flicks to a blue screen and restarts the computer. The last two go to the windows xp screen load about 2/3 of the way and then also flick to a blue screen and restart the computer. I asked my cousin and he said that him and his sister were having the same problem. Please help?