Constant restarting

I am not sure if this is the best forum for this question, but here it goes.  Lately it seems that my XPS 15 9550 is constantly restarting and I'm not sure why.  Almost every time I wake up my computer, it has been restarted and everything I had open is closed.  I am not sure if this is from Dell updates being installed or Windows updates, or something completely different.  I would like to be able to have some sort of control over when this is going to happen.