First off, How did you reformat your harddrive?

If you used the USB drive that you wish to set up for the booting of the CD then you first must know that your computer supports such actions.

Check the system BIOS and see what is enabled/disabled as to the optics drive. In order for the CD to be read to reinstall the operating system the cd-rom must be set to be first boot choice if not , then you cannot set up the computer