I have a P133 class machine that has been in my shop for 3 years playing MP3s.
It has done fine through all the dust, dirt, Florida humidity and heat along
with a fire and the insuing flood. It was one of the 2 things that emerged
unscathed (the other was a home built CMOS spa controller).
PCs are a lot tougher than people admit. I also have one in my car and my wifes
truck. They both crank up in ungodly heat and run.