go to:-
start - settings - control panel - accounts and settings
then click on "change the way users log on and off"
then make sure "use the welcome screen" is ticked
Peter
Suddenly, and for no apparent reason, my login screen has changed from the cool XP login where you get to pick different profiles from their icons, to the "old fashioned" login screen of previous versions of Windows. Does anyone know how to change it back?! Thanks for any advice!

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic