It came with Windows 10 and reinstalling Windows 10 seems fine. It's an Asus Vivobook X403JA. It looks like I'm out of luck with 7 or 8.1 but thanks for the reply anyway!do you get that error when you reinstall the OS the laptop came with? your machine is ice lake 10th gen and installing 7 and 8.1 can be a hit or miss affair on newer hardware. my bet is the manufacturer has locked your machine to w10 and you are gonna be FoL getting 8.1 on it.