Problem is I don't have 2 options from booting. Only one without UEFI. I think i asked a question incorrectly. While trying to install on a partition, it says to enable disk controller but there is not a such thing in BIOS to be changed. After that, I tried tons of things and thought that AHCI could be a problem and forgot about that disk controller. To go back to the first one, disk controller is the issue here i think. Can you suggest anything regarding this?