I have to log on every time if I use my wife's laptop computer, but not when I use my own desktop. Mine has McAfee Viruscan software, hers has some CA antivirus we get free from Roadrunner. So I guess the difference is in how the software is set up. On the laptop, when I go to the login screen, my user name and password are always prefilled, but it won't log me in automatically, even if I check the box for automatic login. I think JB is right - it's a cookie thing.