I have a XP Laptop that is loaded with XP Professional SP3, which after reboot shows the login screen along with my domain.i enter the valid login id & pass - it allows to login, but immediately as if it is logging in - it logs me off without even showing me the desktop,and i cannot do anything.Please help.3 people need an answerI do too

Cold boot. I log in. "Loading personal settings." I see wallpaper, then immediately sent to "logging off..saving personal settings." Now I'm back to login screen. Can't get into Safe-mode either (can't get command prompt only).