i woz watchin a dvd on my computer wen it then restarted and it came up wid a screen that lets u choose safe mode same mode with comand prompt or start windows safely, wen i pressed on each one again and again it goes to the windows xp were the scroll is going from left to right and then it goes to sleep mode and restarts itself i need to know wot to do because i got exam soon?

Optional Information:
OS: Windows XP; Browser: Other

Already Tried:
to go to setup and the comp fan is down