Nothing but a blinking cursor appearing when I try to install

I recently built a computer and I am trying to install Windows 7 64-bit from a usb, the iso being loaded onto the usb with Microsoft's official tool. I further tried UNetBootin, but alas, still no luck.

I've obviously edited the boot order so the usb is run first, but nothing ever pops up past the motherboard splashscreen except a blinking white cursor.

Is there a reason and fix for this?

Try using a DVD or a larger USB (8 GB or high)