sounds like a big question mark over the hard drive integrity. (sadly)
your first hurdle is to recover your data (if at all possible) and since the PC isn't starting, that will entail removing its drive.
if a desktop, removing the side cover will give you access to the drive.
if a laptop, it will either have a separate access panel underneath, usually one for the drive and another for the memory slots, but this varies per make/model of laptop.
some require the entire back plate to be removed while others have the drive sitting under the keyboard (for some god *censored* unexplained reason - please let me one day meet that designer!)
once removed you can either insert it into another PC (if desktop) or put it into an external drive enclosure (if desktop or laptop).
the drive goes into this external enclosure which in turn connects via USB to you other PC. so obviously you'll need access to another PC.
more often than not, drives fail enough that a PC won't boot from them, but not enough that they still can't have data retrieved.
it's all going to depend on how it has 'died'. if indeed it has died. my first priority would be to safeguard my data, if that isn't important to you or you don't have anything you wouldn't care to lose, than I would move to the next step; reformatting and reload Windows from scratch.