...almost, before coming to a whimpering halt.
I could interact with open windows, but could not shut down Outlook, or open Task Manager.
I am fairly certain that it is all due to some unholy union between Vista, Office 2007 (specifically Outlook), and the AntiVirus.
Why doesn't Vista's Task Manager have priority over normal tasks? Note that Vista thinks two Task Manager instances are running.
(Ok, sure a hard reboot worked, but come on, MS.)