Install fresh Windows 10 with Bootable USB

Hi ... my yoga 460 run windows 10 and after a blue screen error (21ca) the system not start up and stuck at check for automatic repair and after a while it tells me windows automatic repair can't find the solution and left me some choices like recovery media ( which i don't make one) also windows resotre point is not working (resotre point made by an critical update from microsoft)  .... how to fix this issue ... and make my machine like the day i bought it ... my guess is i should reintall windows 10 from a bootalbe USB disk ... but how to activate windows 10 at this point