My PC at home and at work both have XP Pro onboard. Both were loaded out of the box with default settings yet on my work computer when I hit Ctrl+Alt+Del I get the Windows Security Box which allows me to lock the computer or make other choices including Shutdown or open Task Manager.

At home when I hit Ctrl+Alt+Del the Task Manager window always comes up. I have looked high and low throughout the OS and the online knowliedge base but can't find a setting switch to change my home computer so the Windows Security Box comes up, so I can lock the computer at home as I do the one at work.

Does anyone have any ideas?