Need Help. Computer won't start

How can this happen? A drive dying or dead so quickly? I honestly use the computer maybe 4hours a day if that.

Heat ... is it enclosed in a cabinet?

Hard drives can give up at any time.

Get your data off it while you can and contact your computer masnufacturer/reseller for a replacement under warranty. You'll either send the computer in for repair or they'll arrange for it to be picked up by courier.

Statistically speaking, any harddrive is most likely either to fail very soon after first put into active use, or after prolonged use when aging from normal use sets in. Inbetween, failure rates tend to be lowest.

This is known as the bathtub curve and actually pretty interesting. Read more here: Bathtub curve - Wikipedia, the free encyclopedia