I have a user that was recently upgrade from a NT 4.0 box to a windows 2000 with all the latest updates. He locks his PC everyday he leaves to go home. When he comes back in the morning he is unable to unlock his pc by using ctrl+alt+del. He has to turn off the PC and turn it back on so he is able to log on. He can though, thru the day lock his PC and unlock it like when he goes to lunch.