Dude I've been having that problem all day! I bought Assassin's Creed III last night and same thing happens. It will get stuck at please wait or it will be at 0% with a 1000-2000 minute estimated wait for the download of update game data. I tried troubleshooting it all day and called customer support. I'm not sure if its a proper fix since I have not had an opportunity to try it yet but I was told to open specific TCP and UPD ports on your router/modem. Once I try it ill let ya know if it works or not.