Linux noob here, I was able to make a dual boot on another computer without problems but it has been a year since I last used Linux. Anyway I did all the normal stuff and thought it was going great because I was able to launch Linux first try. However, when I tried to boot windows 10 from the GRUB it waited a second then sent me back to the GRUB. I then ran boot repair from Linux and now when Linux is selected it goes to a black screen with a blinking underscore in the top right corner. How do I ungoof my computer?