User Accounts

[Wishy]

Hi,
I have XP Pro Single User... I once Press Ctrl + Alt + Del
and selected the Task Manager and later discovered that I
can do that directly... However, when I later try to use
that I see that It directly enter the Task Manager without
any window to choose.... How Do I get that back.. I tried
Entering the user accounts in the Control Panel but I
could not find the Advanced button (or Tab) as some one
else here suggested...

Please assist me with this.
Thank you.
Wishy