I have a macbook pro that's only about a year and a half old. Its worked fine and suddenly yesterday day it started running so slow that I really can't use it. Every time I click on something it does the rainbow circle and takes forever to load up. I've tried cleaning it with mackeeper, restarting it. I even tried reloading snow leopard and the thing failed in the middle and said it had crashed. I really don't know what to do and I need this computer for work, please help!