[Locked] Task Manager Problem

Somehow I can't open my Task Manager, saying it has been disabled by the admin or something.
Any idea why?

Maybe someone with an admin account disabled it.

Impossible. I'm the admin and I don't recall doing such thing, and I'm the only one who uses my computer.

http://windowsxp.mvps.org/Taskmanager_error.htm

Three words.

Great. Thank you very much.

It's like it wasn't a Google search problem.