Hi! I am new to the forums and would appreciate a quick reply My Imac has 4 accounts on it, and one of them will not allow me to log in. After I put in the correct password, it starts loading as if it will log in, then goes to a gray screen and sends me back to the main login page with all four accounts. Strangely, only that one has problems. The others seem to work fine. How do I fix this?