Either Windows needs to be re-installed (Factory Recovery) or the hard drive has died & must be replaced.
Try Factory Recovery first & if that process won't run, it's very likely a dead hard drive but get that confirmed first by testing it with a boot CD containing
SeaTools for DOS, the CD image for which is here: http

/www.seagate.com/gb/en/support/downloads/item/seatools-dos-master/