I used to leave my computer on 24/7 because I was part of the SETI program. That was when I was home in Maine. However, I decided that was a waste of my time and I didn't like the computer always working. I like to turn things off when I'm not using them. And that's what I do now. A lot of people here at the office leave their computers on when they leave for the night but I always turn mine off. I just don't like to waste electricity nor do I want to take the chance that something might happen (lightning strike for example).

So nobody knows of any circumstance when a computer has started a fire?