I have done the dd command. I checked my usb device to see if it was in there since I did do it before, but it didn't work(turned out the USB was in the wrong slot, there was no other USB devices plugged in just in case .Did I really mess up since I enteredthe command pointing to an empty slot?). So, after checking and restarting my comp and boot into the USB and it says there is no bootable disk.