Something Burning

[aalimonline]

There is a very serious problem in my PC. Sometime when I use my PC, smell of burning of any component comes from CPU. And after few minutes computer shutdowns automatically. When I start computer the next day it works fine. I am unable to find what is the problem.

 

[Juice Daddy]

is the heatsink properly seated?

 

[aalimonline]

yes the heat sink in properly seated.