And also when the laptop shuts down, do you get a blue screen or does the laptop just shut off with no warning? Or do you get a screen that looks like multicoloured pixels? If the laptop suddenly just shuts off with no warning, then speedfan may not be able to help as it will take a mean temp from the time performed, obviously not when the problem occurs.
But as Patio is hinting at with speedfan you may have a temp problem. How old is the laptop? Have you ever cleaned it out internally? (Not recommended if you don't know what your doing)
I had similar problems with mine and it was a heat problem, but more info will help us give you a clearer diagnosis.
Good luck and welcome to computer Hope.
