When I try turn on my comp, the screen loads, and it asks me to choose a user. Normally, this does not come up. I choose the one and only user, Stan. It plays the welcome noise, then the shutdown noise, and goes back to the original screen. I can't get in through SafeMode, as it only adds an Administrator user, which I can't log into anyway.

I just got rid of a program called "WindowsSA", which was an internet search toolbar in my system tray (not in the tray, next to it). I'm writing this from school. Please help.