I currently own a HP notebook PC and has the original Windows 8.1 OEM OS and my question is that if I sell this PC will it have more value if I upgraded it to Windows 10 or keeping the original OEM OS? I' am not selling it anytime soon but if I did will it be worth more with Windows 10 clean install or the OEM OS? Just wondering if most people like to be a PC with original specs as possible. Thanks