system
A chat on subreddit /r/pcmasterrace
human
That’s overly complicated, the Windows Recovery Screen is there for that purpose. You don’t need a windows key to use the recovery tool
gpt
Not really if it’s corrupted chances are the recovery is also corrupted, full on recovery usually asks for windows 10 cd/usb so it can compare to whatever it is. Not worth the time and hassle. Windows recover in a situation like this will most likely cause more problems. A fresh install literally takes minutes if you have an ssd.