I don't know why someone said don't use with WI-FI. I am using WI-FI with SL right now.
The autopilot thing, was it a message that kept coming up? That happened to me, I uninstalled SL and reinstalled it and that problem went away. I use a Mac and so don't usually have problems.
The rest of your problems, like the white disc might be simple downloading. Do you have the latest SL viewer?
Sorry, the other answers are so sarcastic. I have always been taught that "there are no stupid questions". Peeps, if you don't want to help you don't have to be ugly about it.