Laptop shuting off for no reason?????

[bleed-black504]

hey im new to this forum this would be my first question i just bought this laptop a few months ago and the other day i was useing it and suddenly it just turns off with no warning it was as if i unpluged it i turned it bak of as soon as it went off....a message appeared it turns off again....i think a min and deside that it was doing this because the computer was over heating so...i unpluged it and let it cool for a while after cooling i tryed again
....worked fine....so my question is ....is this occuring from a internal problem or dose th computer have a emergency shut down when it begins to over heat (i had it siting on a bed at the time the fans where not getting air)