It seems that I can't install Ubuntu on my old Toshiba Satellite C650. Not only I can't install Ubuntu, I can't install any linux-based OS. I already tried Ubuntu 18.04, Ubuntu 18.10 and the latest version of Linux Mint, and it's always the same error. I'm not trying to dual boot, I'm just trying to do a clean Ubuntu installation. Another thing worth mentioning is that whatever option I'm trying, it won't work.