As I recall, they never determined for certain that the computer started the fire, I recall they worded it this way "it started in the area where the computer was".
Smoke detectors throughout your house are key in escaping any fire.
And how many of you open up your desktop computer on a regular basis and blow out all the dust kittens with compressed air? I do it every 2 months, and there always a bunch of dust kittens inside.
Looking around my family room, I see the following potential fire sources, 2 computers, a TV, a cable box, VCR, DVD, stereo, a DSL modem,cell phone charger, ceiling fan and light fixtures
And remember, computers, tv's, vcrs, cable boxes, dsl modems are always using some power unless you physical unplug them, even if they are in the off position. .