I've just downloaded the Dragoborn DLC today.After the install i didn't start the Dragonborn quest immediately.I did some other quests having no problems at all.Then i decided to try out the Dragonborn quest.So i went to the Windhelm docks talked to the guy on the boat and took of to Solstheim. After i arrived in Solstheim the dunmer at the docks gave me a warm welcome and i was free to roam the island. I went to the earth stone nearby and on my way back to the docks my pc did freeze,graphics and sound.No chance to get back on the desktop or starting the task manager. I've never had a complete freeze-up while playing Skyrim.Some random game crashes or freezes,yes,but nothing serious so far.