So, I have a Unibody MacBook, the white one, and lately it's too slow. I mean the CPU is Core 2 Duo at 2.2 GHz and has 2GB RAM DDR3 but it's killing me lately. I am a student and I don't want to waste money on a new Macbook so I have a question. What if I pop the OS X CD that came in the box and reinstall the OS? What will I lose? I don't have any backup? Will I lose all the documents and software?