No bootable device (ACER ASPIRE 3 (A315-31-C0A7)

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  • zaforiqbal
    zaforiqbal Member Posts: 64 Enthusiast WiFi Icon
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    So now what I have to do?
  • JackE
    JackE ACE Posts: 44,581 Trailblazer
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    Have you tried tapping the F12 key when trying to boot from the pendrive? Jack E/NJ

    Jack E/NJ

  • zaforiqbal
    zaforiqbal Member Posts: 64 Enthusiast WiFi Icon
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    Yes! Hundreds of times. Everytime the same problem "Default boot device missing"
  • JackE
    JackE ACE Posts: 44,581 Trailblazer
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    (1) You need to try another pendrive. GPT FAT32 with the installation iso using Rufus. (2) From where did you download the iso? Jack E/NJ

    Jack E/NJ

  • zaforiqbal
    zaforiqbal Member Posts: 64 Enthusiast WiFi Icon
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    I have tried another pendrive made with Rufus all Windows 8 and Windows 10 also all of them are downloaded from it's official sites. But all are showing the same '' default bootable device missing". I can't understand what & where is the problem is?
  • JackE
    JackE ACE Posts: 44,581 Trailblazer
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    You said a few days ago >>>My usb is GPT-partitioned (not MBR) FAT32 formatted and it's also recognised by UEFI bootstrapper. But when I am trying to boot from it system says "Default boot device missing" what should I do. Is there any problem with my disc partition?>>>

    At this point, you should insert the bootable pendrive and hit any key. Jack E/NJ


    Jack E/NJ

  • zaforiqbal
    zaforiqbal Member Posts: 64 Enthusiast WiFi Icon
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    It goes back to F12 boot menu and shows mu USB and when I press enter it shows that massage again "default bootable device missing"
  • JackE
    JackE ACE Posts: 44,581 Trailblazer
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    If you choose Boot Mgr and select the bootable pendrive, does it also give the same result? Jack E/NJ

    Jack E/NJ

  • zaforiqbal
    zaforiqbal Member Posts: 64 Enthusiast WiFi Icon
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    Yes! I have tried everything everytime I got the same problem.
  • JackE
    JackE ACE Posts: 44,581 Trailblazer
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    And the same thing happens when UEFI secure boot is enabled or disabled? Jack E/NJ

    Jack E/NJ

  • zaforiqbal
    zaforiqbal Member Posts: 64 Enthusiast WiFi Icon
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    I tried both Enable & dissabdi
  • JackE
    JackE ACE Posts: 44,581 Trailblazer
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    Does you BIOS Security tab look like this? Jack E/NJ


    Jack E/NJ

  • zaforiqbal
    zaforiqbal Member Posts: 64 Enthusiast WiFi Icon
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    No it's looking like this

  • JackE
    JackE ACE Posts: 44,581 Trailblazer
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    Close enough. Try setting a supervisor password (don't forget it!!!). Save settings and exit. Shut down. Insert your bootable pendrive Then re-enter the BIOS Security tab. If select UEFI trusted file can be entered, see if you can find and enter a grubx64.efi or bootx64.efi on the pendrive. Jack E/NJ

    Jack E/NJ

  • zaforiqbal
    zaforiqbal Member Posts: 64 Enthusiast WiFi Icon
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    Yes I can find it but I can't enter
  • JackE
    JackE ACE Posts: 44,581 Trailblazer
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    Yeah, sometimes that happens with ubuntu. Try entering grubx64.efi in the space provided with the keyboard instead of just clicking on it. Jack E/NJ

    Jack E/NJ

  • zaforiqbal
    zaforiqbal Member Posts: 64 Enthusiast WiFi Icon
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    I tried but can't enter. Should I format my pendrive and make it Windows 10 or 8.1
  • JackE
    JackE ACE Posts: 44,581 Trailblazer
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    When you click on grubx64.efi, do you get a screen like that shown below? If yes, just type in from the keyboard "grubx64.efi" without the quotes. Jack E/NJ


    Jack E/NJ

  • zaforiqbal
    zaforiqbal Member Posts: 64 Enthusiast WiFi Icon
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    No! When I click grubx64.efi nothing happens or got nothing
  • JackE
    JackE ACE Posts: 44,581 Trailblazer
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    Hmmm? Does your mouse seem to work in the BIOS menu OK? How about using any of the arrow or function keys listed at the bottom of the BIOS menu? Jack E/NJ

    Jack E/NJ