Restoring password of a WIndows hosted network
You could reset your password by setting the whole network up again ie (via here):
netsh wlan set hostednetwork mode=allow ssid=rambo key=rambo123 keyUsage=persistent
or
netsh wlan set hostednetwork mode=allow ssid=rambo key=rambo123 keyUsage=temporary
Although, if you've forgotten your password, all you need to do is (via here):
netsh wlan show hostednetwork setting=security
Then you'll see User security key:
and your password