My Mac has been much much slower since I installed Snow Leopard, and I think it may be due to the fact that I did not do a fresh install when I installed it. So Now, I'm considering doing a fresh install. However, if something goes wrong, or something doesn't work, I'm wondering if Time Machine has allows you to restore a whole state? For example I could go back to how my Mac used to be without having to install everything again? Thanks.