I'm a newbie here and I apologize for posting this question inspite of there being numerous people with the same problem who've posted similar questions. I can't seem to understand what to do.
I'm installing Ubuntu from a bootable USB drive. After pressing F12 while startup and choosing the USB drive, I see the Ubuntu desktop. When I proceed to install Ubuntu it says: "No OS was detected, do you want to erase everything on your drive and install Ubuntu" or "Something Else".
Of course I don't want to erase everything because it'll remove Windows 8 as well. I'm trying to install Ubuntu on the EFI mode. My Windows 8 is installed in the UEFI mode as well.