Recently my power supply blew while I was playing an MMO. I bought a new power supply and installed it. The computer turned on like usual and ran for about 5 minutes then turned off. When I tried to turn it back on it tells me that my CPU is overheating. I did clean it and replaced the cooling paste. I checked the fans in it as well to make sure they were not damaged. It still does this after I did this. I am trying to figure out what might be wrong with the computer. The screen comes on and you can see my desktop but if you do anything on it the computer shuts down. If I just let it run it shuts down after 5 minutes. What else could I do to figure out what is going on with my computer?