PC crash or fan running very loud probably because need to replace thermal paste
How to replace PC's thermal paste. Old thermal paste can cause PC crash or fan running very loud especially in hot weather. If your PC is more than three years, you probably need to change the thermal paste when it runs very loud or sometimes crash.
How to replace the thermal paste. First remove the CPU cooler if it is a desktop. If it is laptop, remove the heat dissipation tube. Then using rubbing alcohol to remove the old dried out thermal paste.
The next step is apply the new thermal paste on the CPU, don't put too much, just put enough to spread over the CPU.
Then put the CPU cooler on if it is a desktop or heat dissipation tube on if it is a laptop
Where to buy a good thermal paste.
I found some good quality thermal paste on ebay with better performance