The company I work for has a few intranet websites that require our user credentials. Internet Explorer somehow knows our credentials by defualt and logs into these intranet pages automatically. If I go to the pages with Firefox or Chrome, it prompts me for my credentials. As of a couple of days ago, one of our users can no longer open up the intranet sites in IE without having to enter their user credentials. I am not sure why this all of a sudden no longer works for this user and am trying to fix it, but I don't understand what is happening behind the scenes with IE to begin with. I've reset IE to the defaults but that didn't fix it. Is there some sort of certificate that IE looks to in order to get these credentials? Any ideas on how to get this particular user back to having the credentials automatically entered?