Hopefully someone can help me. I trying to figure out why my macbook pro running tiger has started logging me out immediately after I log in, and what I can do to fix this. I am correctly entering the password (just in case you thought I didn't know the password) as it accepts it and logs in, starts to change the desktop background and then just as the Finder bar appears I am logged out and send straight back to the main login box. It does this for the main User (admin) account. I have tried booting in safe mode and this does the same thing. The Guest login does work however. I believe this started becahse my mac was taking an inordinately LONG time to shutdown (>3min) and I powered down the machine manually during the grey screen after waiting too long. Since then this log in problem has occured - essentially locking me out of my computer. Any help would be greatly appreciated!