Lenovo Won't Boot: Understanding PCI IBA GE Slot Issues

in preference Inadvertently, i pushed GE Slot 00C8 v1403, pc fails to boot ubuntu and showing Reboot and Select proper boot device since then

I had this question of How can I remove IBA GE SLOT 00C8 V1327 From the Boot Sequence and also what the h*ll is it? The only answer I could

iba ge slot 00c8 初期値は、「IBA GE Slot 00C8 v1381（ネットワーク）」です。 USB記憶装置などを接続した場合、接続した装置の型番が表示されることがあります。 CDDVD ROM Drive

ibayar slot IBA GE = Intel Boot Agent, Gigabit Ethernet IBA GE Slot xx means there's an Intel NIC with a boot ROM in PCIPCIe slot xx, where slot