Users??

[hermes01]

I seem to be having trouble with mu computer all of the sudden every time i start windows up a "user login" page comes up and asks me how i want to log in. Since this is a home computer we only have one user the default no new users have been added. I tried contacting Microsoft but they refused to answer my question as i only have the OEM version of windows ("OH NOOO WHAT A TRAGEDY!!!"). I'm not sure if it is because of some software or utillities i have installed or some other problem can anyone tell me how to get rid of this problem? I have checked through the users page on control pannel and there is nothing there??? What is happeneing????