I just installed Leopard on my Macbook. I noticed that there are a bunch of other computers under the sidebar in finder that I can connect to through my apartments internet network. I was just wondering if Leopard automatically sets up my computer this way. What Do I have to have enabled/disabled/checked to make my sure my computer isn't viewable to others? I don't want it viewable, I don't even want them to know I'm on the internet as I don't see it's necessary, and I want to make sure they can't see my stuff. So what do I need to check?