Hi everyone, I'm new in using forms so if I post a wrong thread, just teach me how to do it right the next time. The last few weeks some unexplainable problems appear. No errors, No unusual activities in my Activity monitor. But my laptop gets very slow, even typing and moving my mouse is sometimes hard to do. The problems appear suddenly and totally random, there seem to be no specific actions that trigger these problems. Also the problems are gone just as random. I have tried to totally reinstall my OSX and have tried running it without putting on my backup files again. I have tried changing my upgraded HD with the original HD and also I have put back my original RAM. Unfortunately nothing works... I hope this gives a good explanation in what I have tried already, as I fear the worst I hope you guys have some good tips in what it might be or what I might try to fix this. Thank you so much already!!