rog maximus vii formula bios help

[rudeboi]

i have just updated the bios to latest version 0901 as i have had a issue with lan everytime i turn my pc on it allways state's i dont have a internet connection but if i do a restart it works but if i shut down then turn back on does the same so thought i would just do a fresh install of the o/s but upon booting from usb it will not show up my m.2 in the select drive to install on so ive tried various bios setting but cannot seem to fix it im not A WIZ KID WHEN IT COMES TO BIOS I i only know basics from trying to read the manual or if i even have set the bios up right at all

anyone able to help/ educate me on what im doin wrong

many thanks