Hello everybody. I was using Slackware and decided to move into Xubuntu. I moved ISO-image to USB-stick using Win32 (I borrowed Windows computer because I don't know how to install Unetbootin on Slackware). Since I enter BIOS, it hase TWO Ubuntus (two, because there were TWO folders in /boot) (one is written Ubuntu, second is just ubuntu) but both move me into grub, where I see seems like it requires some command, maybe some knows what to do? I'd started creating menuentry kinda I have ISO on USB but then understood that I've already have bootable flash (ha-ha). Though, if driving via secure boot off, then clicking USB drive, there is "no bootable device found". Help me, please. Thank you.