I have periodically experienced website lockup which I think may be related to the login assistant. This morning I was trying to add a payment account to my chase credit card. When the screen came up to enter the account info the site locked up. This has happened other times with other sites and seems to only happen when there are fields that need to be filled. The reason I think it is related to the Norton program is that at the top of the page a displacement takes place similar to what happens when a login screen is presented. In the case of a login screen the Norton toolbar comes up, but in this case no toolbar appears. What I see is the top of the original page and the same top of the page displaced downward about the same amount as the width of the Norton toolbar. When this happens the site locks up and will not respond. I have repeated this several times. It also happened with the United Airlines website.