Hi, Sandy.
Looks like I have the same problem (firmware upgrade) and running nvmupdate64e of version 1.0 (by the way, nvmupdate64e -v outputs NVMUpdate version 1.24.33.08) gives the same result '01) Intel(R) Ethernet Converged Network Ad 8086-1572 05:00 Update not available'
Appreciate your help!