I bought a Lenovo It has an UEFI firmware associated with Windows 8 OS protecting it by secure Boot feature. When i boot in recovery mode i could see an option saying about UEFI software/hardware. I used GParted and deleted ALL its partitions. I installed 8 again with my partitonign. No UEFI present there and no option on the recovery menu as before. How can i re-associate UEFI firmware with Windows 8 OS as it was when i bough it? What's the reason of UEFI existance anyway? In what ways can it be usefull?