Hello! I'm running Mavericks on a 2008 Macbook Pro, and have been experiencing extremely slow start ups, shut downs and, just recently, super slow trash emptying. I checked the preferences for the trash, and "Empty Trash Securely" is not checked. I'm wondering what's going on, and if there's anything I can do to fix these problems? The only major change I can remember was buying a new external hard drive for my time machine. Thanks!!