I have one Word.. Turn it off now!!(ok thats 3) Before you start melting your components..

You need to cool that thing down. that 77c is close to melting temps!!

You need to get a laptop cooler or something. Can you open up the laptop and clean it out a little? I would turn it off for a good hour before doing anything. Not a joke!

Edit..Lol Ok 4 I missed the "it"