I have noticed that Dentrix does not allow the user (me) to lock the pc, and allow someone else to log-in and use Dentrix (multiple user features). Just about every other program I have used has that ability to open the program and log in as someone one, log out (leave program up), and someone else can log in without shutting down the program and reopening. I asked the help desk today, how to do this (change user), and they said you have to close the program totally every time.