Is there a way i can go from windows 10 to windows 8.1? On windows 10 i keep getting "critical structure error" after the most recent update from windows. Is there a way I can revert to a previous update without loosing all my downloads that I made after that update? I'm not very tech savvy so a detailed walk through would be amazing. Also are there any cons from going from windows 10 back down to 8.1? I can't find a product key on Microsoft's website so idk which websites are scams and where to buy a real genuine product key if i do end up needed to go to windows 8.1. Thanks guys!