Pulling the plug was a last resort... I waited over four hours for it to finally end the program and shut down. Yes its plugged into a surge protector...
(slightly off topic: many places say that those things don't protect anything at all, that, if a power surge comes, your stuff will still get fried. The only purpose it serves me is extra outlets.

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I tried the power button the first time, it did nothing. I'll try it again now. Thanks for your patience, everyone,
*edit*
Alright, I held the button in for like 10 seconds, and ti just shut off, suddenly. How is that different than unplugging it from the wall...? It was the same effect. However, I didn't know I could do that, and I appreciate it.
And this is a pc, no administrator. The task manager bit did nothing as well, I know that little trick.
I ran the updater after it started back up again, and still no new updates. Only one update for me.
What else should I do before trying to run the client again...?