Kodi (16.1) freezes every night on windows 7

I am not sure what happens but when I leave Kodi running (not playing anything) it freezes when left on overnight. I have resorted to having kodi shut down after 2 hours, but there are times when I want to watch movies in the bedroom and I need this kodi machine running… any ideas on what could be the cause… and I know I should post a debug log but dont have access to one at the moment… cheers!