Windows 10: Window 10 go to UEFI mode and stuck dual boot with Ubuntu

Discus and support Window 10 go to UEFI mode and stuck dual boot with Ubuntu in Windows 10 Installation and Upgrade to solve the problem; Before this happen, i installed Ubuntu dual boot on a completely free disk space that i shrinked i have successfully installed Ubuntu dual boot on many... Discussion in 'Windows 10 Installation and Upgrade' started by HongLy5, Jul 10, 2021.

  1. HONGLY5
    HongLy5 Win User

    Window 10 go to UEFI mode and stuck dual boot with Ubuntu


    Before this happen, i installed Ubuntu dual boot on a completely free disk space that i shrinked i have successfully installed Ubuntu dual boot on many machines. However, this time, when i choose window on GRUB menu it go straight to UEFI and there is no option to go to Window 10. Does anyone suggest how to fix this? Thank you.

    :)
     
    HongLy5, Jul 10, 2021
    #1
  2. SUNDAR KUMAR AKELLA
    Sundar kumar Akella Win User

    Dual boot options- Ubuntu and Windows 10

    Original Title[Dual Boot]

    I have updated from windows 8.1 to Windows 10 quite recently, now I want to dual boot my laptop Dell Inspiron 3542, with Ubuntu. But the thing I heard all over the Internet is about the UEFI and Legacy Boot modes and mine is in UEFi mode. In the boot options
    there is an option to change boot mode from UEFi to Legacy BIOS. Is it safe to do so. Doing so, does it help to dual boot with Ubuntu?

    My boot mode is set to: UEFI with Legacy OPROM.
     
    Sundar kumar Akella, Jul 10, 2021
    #2
  3. TOPGUNDCP
    topgundcp Win User
    Help with dual booting Win 10 and Ubuntu

    This is your whole problem. What you should have done is to put GRUB in sdb1 and Windows Manager in sda1 so that Windows Boot Manager is in control.
    So what suggested above will not make any difference. GRUB is still in control of booting process.
    To fix your problem. You will need to:
    1. Move GRUB from sdb to sdb1
      |grub2 - how to move grub boot from one partition to another in linux - Ask Ubuntu
    2. Rebuild The Windows Boot Manager ie. create a brand new BCD to boot Windows 10.
    3. Once done with steps 1 and 2 above. Windows will not know UBUNTU exists and vice versa.
      Depend on the priority set in the BIOS, it will boot directly into that OS.
      However, you can boot either one from Boot Menu (Using whatever key that your Laptop assigned to: F2, F10....)
      Since I hate Dual Boot and seldom boot into Linux, I will stop here.
      Now, go to step 4 to create dual boot.
    4. Use Easy BCD to create an entry for dual boot with UBUNTU. Once done, you should get a nice GUI dual Boot Menu
      and it will boot directly into either Windows or UBUNTU.

    Here's the detailed explanation: How can I move windows 10 boot files to another drive to allow linux
     
    topgundcp, Jul 10, 2021
    #3
  4. DAVIDHK
    davidhk Win User

    Window 10 go to UEFI mode and stuck dual boot with Ubuntu

    davidhk, Jul 10, 2021
    #4
Thema:

Window 10 go to UEFI mode and stuck dual boot with Ubuntu

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