Hello Samuel
My name is Dayarys.
Most of the time this issue is because the USB is not properly created, then I recommend you download again the iso on a Windows computer, see the link below to download Windows 10:
https://www.microsoft.com/en-us/software-downlo...
and create again the USB.
Reference:
https://answers.microsoft.com/en-us/windows/for...
Sincerely,
Dayarys