First power cycle the computer and enter the bios, go to the boot order and see if you drive shows up, if it doesn't, open the computer and try reseating the drive (unplugging and plugging back in) if it still does not show if you can you can try plugging the drive into a desktop or external drive enclosure into a running computer and see if it recognizes it, if not its fair to say that your drive has died.
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Also try booting from windows ## install media and see if it can find a problem
First power cycle the computer and enter the bios, go to the boot order and see if you drive shows up, if it doesn't, open the computer and try reseating the drive (unplugging and plugging back in) if it still does not show if you can you can try plugging the drive into a desktop or external drive enclosure into a running computer and see if it recognizes it, if not its fair to say that your drive has died.