I found the answer on TechSpot.com -- if you double-click on the empty space
to the right of the tabs, they disappear. You have to double-click again to
get this area of the window back.
> Over the past week or so, my Task Manager in Vista Business has changed.
> When I launch the Task Manager now, only the list of tasks appears... there
> aren't even any tabs in this window and only ESC will close it. It's almost
> as if I suddenly have "Task Manager Lite" on my system and it doesn't matter
> if launch it from right-clicking the task bar or doing a CTRL+ALT+DEL to get
> the menu.
> Does anyone have any ideas about why this might have happened?