HOW TO FIX COMPUTER SHUTDOWN RANDOMLY | SOLVED

Computer shutdown randomly it's frequent problem for the old PC, it's very big problem because you just don't know when your computer shutdown, it's your lucky day there is some solution for computer shutdown starting with:

1- clean the dust off from the cooling block.
2- change the thermal paste.

if the problem persists then watch this video:

or Follow the instruction 
1- button start => control panel

2- hardware and audio

3- power option

4- change the mode settings

5- change advanced power sittings

6- this window will apear

7- down till you find processor power management 

8- show the maximum state of the processor & change it from 100% to 70 or 65 

if that don't work take it to specialist 
i wish it's works with you.