Intel I350 NIC Firmware update

You’ll need to boot into UEFI shell, assuming the PC has a UEFI bios. Get ALT Linux Rescue(x86_64), Intel Ethernet Adapters Connections CD, and rufus.

Write the ALT Linux Rescue ISO file to a USB drive using rufus. Extract from the intel zip, APPS\BootUtil\EFIx64*BOOTUTIL64E.EFI* & APPS\BootUtil*BootIMG.FLB* to the root of the USB drive. At the ALT Linux Rescue boot screen, select efi shell. At the command line,

fs0:
BOOTUTIL64E.EFI
BOOTUTIL64E.EFI -ALL -FLASHENABLE

reboot (ctrl-alt-del)

BOOTUTIL64E.EFI -UP=PXE -ALL -FILE=BOOTIMG.FLB

Drive fs0 may vary.
Command line parameters are at https://downloadmirror.intel.com/24180/eng/BootUtil.txt