I did clean installation of Ubuntu 16.04 LTS on my ASUS X550C PC a few month ago. But now I need to install Windows 7 on it. I tried to boot the PC from USB with Win7 (my DVD/ROM is not working). In boot options USB is not listed (even when I stick the USB before booting) in BIOS.
This could be related to something other than the OS, but I did clean installations before without problems. And since I'm not good with Linux systems, I decided to ask here. Any help is appreciated.