I would like to install Ubuntu on my computer without usb (Do not have one on me atm, and I dont have an optical drive) I DON'T want to dual boot. I just want Ubuntu and nothing else. I tried using unetbootin but when I restarted it said something like " \ubndlr.mbr missing. So how would I install ubuntu alone without usb or cd drive. (I am currently On windows 10)