Just to be clear here, you're saying you've never heard of a hard disk failing in a PC? Somehow, I think it's a bit of a stretch to equate that to the existence of the abominable snowman.
Hard disks fail, period. It isn't always heat that causes the failures. They fail in PCs, Macs, DVRs, game consoles and wherever else they are installed.
You've actually quoted me then asked me a question that clearly demonstrates you haven't actually read the quote or if you have then not absorbed the content - please try again.