I'm sorry to make a thread since there is a sticky, but I can't start it.

I'm level 10 exactly and I've talked to every guard in every city, nothing. No one will say anything about the Dawnguard. I even tried to find the place on my own using a map but no luck, I can't find it. What am I doing wrong?

hmmmm if the game is laggy then it will be because since it's newly installed it will take time did you restart your system? or did you let your xbox360 system cool down a heated system can also causes lags to appear

Maybe that's it. I was playing Skyrim when it downloaded. I'll restart my Xbox and post back here if it worked.

okay yeah usually DLC's are well *itchy when it's newly installed it happened to me once and i restarted my game and it worked just fine and if restarting doesn't help i suggest wait until your system cools down

Thanks man! I restarted it and as soon as I went into Riften I was attacked by Vampies. It worked and the quest is started.

welcome! but yeah remember that with every new DLC that gets installed on games especially those kind of games it's highly recommended that you restart your game everytime have fun!