I have a home built system which I have had for a few years and last year some time it started to randomly shut itself off. When I loaded up speed fan I found that the CPU and you temps were running hot. So when I opened up the case I found that there was a lot of dust. I blew all the dust out and found that the temps went back down to normal and all was well.
Well just the other day it started shutting itself off again. I looked at the temps and they were running kind of hot. When I opened up the case I found a little dust but not too much. I cleaned it out and it didn't really cool down at all.
So nothing has really changed. All the fans are spinning correctly. I am not sure why it is running hot. I assume that is why it is shutting down. Any ideas as to why this would just start happening again?