log in window freeze

"Vault is Closed" in IE 11 (Win 8.1) shows when opening IE.  Inputting login  email name and password causes log in window to display "logging in" message, password showing, and it freezes.  Can't cancel log in, just close log in window;  When I subsequently click on Vault Closed in toolbar, "logging in" window, still frozen, redisplays.  Usually need to restart computer to get it to work.  Any others having this problem?