I built a computer about 2 years ago, though something appears to have happened about 3 months or so ago, and I am not sure what the problem or the solution is. I think I may have been running to hot for too long, and that may have fried some circuits or the CPU itself. My fan is fine it was my fault in that I wasnt running it as long as I should have been. Now everything seems to lag too long. It dosent appear to be a problem with internet. It just feels off. Things that should take a fraction of a second are taking way too long. Email, pictures, video. My internet stalls when opening all the crappy ads. Its like my computer is underwater. What can I do to correct or check this locally ? Im fairly good with computers, and I am out of ideas...