Hey all, my 17inch macbook pro is running pretty slow as of about 2 months ago and i dont know why. i still have about 250 gigs left of space so that cant be the problem.Even just opening Firefox or Safari i get that rainbow wheel and it just doesnt do anything for like 5-10 minutes. its driving me nuts! same with opening applications. is there anyway i can clean something up to make it faster? or any suggestions at all? thanks a lot for any help!