My 2008 Macbook Pro Unibody 15" runs almost perfectly, but since one month or so, fans start to make noise or get activated in stupid situations where I am not doing really anything (just browsing the web or really nothing).
Sometimes the process
activitymonitord get a lot of threads or CPU usage and consequently fan activity. I guess I installed something that somehow corrupted the system. If I boot the computer into safe mode, it does not happen! So it is clear to me that it is due to software. How could I compare system state between safe mode and normal mode so I get real clues about the cause of the problem?
I opened the Macbook and cleaned the fans, and also tried SMC and PRAM reset several times.