Starting today, everytime I come to SMC I have to log in. What's more sometimes every time I click on something, I get a "User Selection" screen that pops open wanting me to select "unregistered" or "Lee Schierer". When I sleect Lee Schierer and log in, sometimes the next screen I click on casuses it to start over again and want me to select a user.

Nothing new has been loaded into my computer and I made no selection changes at SMC. I have active virus protection, which updates daily. I've rebooted the machine and it still does the same thing.