Disable EFI bootloader Windows 10


  1. br4to92
    Posts : 9
    Windows 10 Pro
       New #1

    Disable EFI bootloader Windows 10


    Hello guys, i have a problem regarding dual-booting Windows 10 along Ubuntu. After installing Windows 10 and Ubuntu after it, i'm no longer able to boot into Ubuntu, it starst directly into Windows 10. In Windows 8.1, i could chose at startup which OS to run (using Linux's grub2 or Windows Metro bootloader). I have Secured boot option disabled inside BIOS. Also if i want to use EasyBCD 2.3 to edit boot settings, i get a warning that EFI Bootloader is detected. Is there a way to do it? Thanks!

    Disable EFI bootloader Windows 10-capture.png

    Disable EFI bootloader Windows 10-20171221_092431.jpg
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  3. Caledon Ken
    Posts : 30,178
    Windows 11 Pro x64 Version 23H2
       New #2

    HI br4to92.

    As a test try shutting of Hibernation in Windows 10 that will disable WIndows Fast Startup.

    To a command prompt(admin) or power shell(admin)

    powercfg -h off

    To reverse, change the word off to on in command. I don't use EasyBCD so we will let a another member answer that question.
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  4. br4to92
    Posts : 9
    Windows 10 Pro
    Thread Starter
       New #3

    Hello and thank you for your answer. I disabled the Hibernation as you said (now i don't have the 'Turn on fast startup (Recommended)' inside Power Options), but after a restart, nothing changes, still boots into Windows 10. From what i've read i think the EFI detects another bootloader at startup and deletes it (Linux's grub2), because normally, after Ubuntu's installation it should boot directly into grub2 bootloader (i attached a picture). I'm using EasyBCD usually to repair the Windows Metro bootloader (picture attached - it should look just like the screenshot) to chose from it which OS i want to use.
    Disable EFI bootloader Windows 10-capture1.png Disable EFI bootloader Windows 10-capture2.png Disable EFI bootloader Windows 10-capture4.png

    Disable EFI bootloader Windows 10-capture3.png
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  6. Caledon Ken
    Posts : 30,178
    Windows 11 Pro x64 Version 23H2
       New #4

    Well it was worth a shot. I had read it can cause issues. I'm sure there are members with experience and expertise in EasyBCD. Once we get over the holiday hump I'm sure you will get an answer.
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  7. br4to92
    Posts : 9
    Windows 10 Pro
    Thread Starter
       New #5

    Thanks. I know it's not the right time to start a new topic, but i hope i'll get an answer (after the holidays), as you said. By the way, I wish you a Merry Christmas! :)
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  8. br4to92
    Posts : 9
    Windows 10 Pro
    Thread Starter
       New #6

    I managed to solve the problem on askUbuntu forum. Basically, the Acer systems requires some additional steps inside BIOS (to mark "trust" the Ubuntu's EFI files and set them as 1st option as boot option), for enabling Ubuntu's Grub2 bootloader to start before Windows 10. Now everything works. I don't have to use EasyBCD inside Windows 10. Have a great weekend everyone!
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  9. Caledon Ken
    Posts : 30,178
    Windows 11 Pro x64 Version 23H2
       New #7

    Very cool. Thanks for posting the solution.

    Happy New Year.
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  10. br4to92
    Posts : 9
    Windows 10 Pro
    Thread Starter
       New #8

    Thanks! Happy new year! :)
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