I'm getting the beachball frequently when using Safari and Microsoft Office. At times the beachball doesn't go away for even 1-2 hours, so now I have to frequently hold the power button to reset it. Sometimes when I reset it and get to the start up screen, I see a circle with a line through it (like a DO NOT DO THIS sign) instead of the Apple logo. Apple wants to charge me money to walk me through troubleshooting steps. I can't find/think of any program running in the background that would be slowing it down. Why might my computer be slowing down? It's a 1 year old 13" MBP.. ALSO, how do I defragment my harddrive?