Ok, I tried to log in with safe mode and it does the same thing. It logs me in and then a second later it logs me out and says 'saving your settings' on the log in/out window.

Not sure what to do...

Norton detected hacktool.rootkit and I was able to remove it and I believe the infected files as well, and now when I go to log in it makes the windows sound like it does when you successfully log in...