I did not even know what it was called until it happened to me. Anyone know why fast switching is happening to me all of a sudden? For instance, when I come home from work and move the mouse... now a log on is waiting for me and when I key the password in the screen does this totally amazing yet annoying thing.. it cubes to the real screen. So I searched hear and found it is called Fast Switching, so something like that; and I want to know how to stop it from happening... I do not have it turned on... sys prefs ... user accounts... etc... not turned on at it happens any way. Suggestions please... short of uninstalling and reinstalling the entire OS... ps just to be honest ... I beta test the OS.