OK! So I had this issue before and rshaffer61 some what helped me out HERE
I now have the same issue but only on my account and not the others. I have 4 accounts on my computer to which 2 of them are no longer in use.(yes they will be removed after I have this issue resolved.) I can shut down/restart on the one account but whenever I try to shut down or do the updates on my account, which is the main account, it refuses to shut down.
My question is why or what would cause this to only happen on mine and not on the others? Haven't changed or done anything on here different. It seems to be fine for a spell then starts all over again. Never really did find out what exactly caused it last time. Just assumed it was corrected by an update. I have kept up with the updates since and then one night went to shut it down and it hung.
Any thoughts are welcomed.