Welcome Screen Gone after Screen saver

After the last Microsoft.net Framework update, login slightly different my ADMIN user and GUEST user login show up in the XP welcome screen, but the password box is already highlited as if I had clicked on the ADMIN user picture. That does not irk me much, but after the screen saver comes on , if you touch a button or move mouse instead of the Welcome screen again like it used to ,which again had ADMIN or GUEST, it has the "traditional classic" login " "This computer is locked..... I would like to have it go back to the welcome screen after the screen saver has come up.