Have had my i7 MacBook Pro 15" for a little over 2 years. The past year or so, it has been constantly getting very hot all the time, even if there's only 1 or 2 simple apps opened. The fan goes on full blast all the time and it's almost always hot. I thought the overheating was being caused by dust perhaps, so I opened it up and dust wasn't a big problem really. I even sprayed it with a can of air to make it totally clean. That didn't work, so I'm thinking it's a software issue. I check the Activity Monitor and there's nothing unusual, though. This wasn't a problem in the first year I had the computer, but in the last year, it's been a constant annoyance. I installed Mountain Lion on it a few days after it came out and have had bad results. Constant crashing of Safari, MS Office apps, Skype, iPhoto, VLC, etc. If it's not freezing, then it's got beach balls and very unresponsive. I do not mind paying for some software that might fix all these issues, but I don't know which one would be good. Is there some kind of diagnostic software out there that might do the trick? Or, at least solve 1 or 2 of my problems? The computer is still functional, but I'm just getting annoyed by these things over time. If anyone can help me figure out what I can do about these things, I'd appreciate it.