You'd want a fresh install not just an in-place upgrade. You can even install an OS without specifying a product key, although since W8 or so they started being included in BIOS/UEFI.Unfortunately w8 licnce is not accepted
Because the new installation doesn't give a crap about files currently on the disk? I don't feel like you're really trying at all and just resigning to defeat, despite having a relatively simple path to resolution.How can that be replaced if I can not start it?