It sounds like the transfer of the iso to the usb drive wasn't done successfully. Did you create the USB drive from under Windows? Try creating your bootable usb drive by using rufus or etcher, I've had bad experiences myself with unetbootin that I ran into that the usb drive wouldn't boot.
And Welcome to linux.org forums . Could you please only create one topic per problem, you have this topic and the same topic posted in another part of the forums.