This is now my 3rd thread since I'm getting no replys. My pc keeps shutting down or freezes but mostly shuts down. Sometimes as soon as I put in my password or 5 min later

What I have tried
-New ram
-diagnostic test 70$ at frys
-new psu
-all plugs are connected securely
-bought new internet cable
-bought a air duster.

Whenever I run burn in test i get no errors but my pc crashes almost instantly.

I have turned off Windows's 7 cooling policy

Bench mark test I get horrible scores "tree trunk"

Now internet explore won't even open and I'm screwed cuz google chrome was deleted.

I have spent countless hrs and money trying to fix this. This is literally giving me a headache.
So how do i stop my pc from rebooting or freezing. If it helps I downloaded "core temp. It says my tj max 80c but the other max 45c and min 20c but the weird part is that the tempture maxes on the bottom right change ? My actuall CPU temp hovers around 25c idel but when I run a small program it shoots up to 40c and boom crash. Please help