@EvilRaceHorse @EvilRaceHorse wrote: My laptop is Medion Akoya E2216T MD 99940. (....) I'm trying to install Lubuntu/Ubuntu 18.04 on this laptop using a bootable USB. It works PERFECTLY with other laptops. But with this one, it refuses to boot from USB for some reason. I have disabled "Fast Boot", "Quite Boot", "Secure Boot" on the BIOS. , I do see the USB on the connected devices and also the BIOS itself. This exact same thing happens with an external hard drive as well. How did you make your USB Stick? With which program? Your UEFI-Bios allows only to boot from a certified (equipped with Microsofts signature) UEFI compatible bootstick. If it helps, try to boot with deactivated Secure Boot. Thats all. You also can start your PC by repeatedly tapping F10 tab immediately after pressing power button. (some NBs need the F8 tab) It will show the single bootmenu solely on your screen, without entering UEFI itself. Within the menu you can choose your USB stick if it has a UEFI stamp. Secure Boot should be set to Off and Standard. If it does not boot, the stick doesn't meet the UEFI requirements If your Stick boots with other PCs, then those are not UEFI-PCs, or have a Compatibility Support Mode (CSM) setting (also named Legacy, Win 7/Other OS). cheers, daddle
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