So windows no longer boots but ubuntu does. I want to reinstall both however because the changes I have made to various settings is off and it would be easier to fix them by just reinstalling (not to mention it is an outdated version).

However, when I try to boot from a flash drive ubuntu, it continually brings me to this:


despite their being an open partition and me giving priority to usb booting in BIOS. How do I make this stop?