I want to install only Ubuntu on my new laptop. But before that, I would like to make a backup of the Windows OEM installation on my laptop and then later, in case I wanted to sell the laptop, I would copy it back no the disk to increase my chances of selling it for a reasonable price.
I want to do this without having to start Windows at all (i.e. accept EULA, etc.), and no, I don't want to dual-boot.