Weirdly enough its happened twice in 45 minutes and never before?.. once when i opened the journal to save the game it froze, and the other as soon as i leave a house..

its happened only in Riften, once i managed to carry on after 3minute freeze, and the other i had to restart the whole system

How long have you been playing?

today, i'd say about 70minutes?

otherwise iv'e played through 17days