Honestly I was thinking it could've been some sorta of overheating issue if it just locked up.
When I asked her if she's ever cleaned it out she said no, and if it's the same computer I'm thinking of, it's oooooold.
That's another freaking problem. I haven't gotten any good details on what happened besides, "Oh, keyboard and mouse locked up and I couldn't reset the computer with the power button held down so I had to unplug it from the wall. When I turned it on, it made a buncha beeps so I turned it off, and it worked again later in the day."
Pisses me off when something vague like that comes around. I told her if it happened again to call me again.