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I had Ubuntu 15.10 and Windows 10 on the same drive. I wanted to remove Ubuntu so I did following steps:

  • go to disk manager and remove two Ubuntu partitions and add free space to windows partition.
  • run Windows USB installer with command line ant type: bootrec.exe /fixmbr

The thing is that Ubuntu boot options were not removed from my BIOS. I had to manually switch it to Windows boot because the computer was starting with a GRUB command line.

Is there a way to safely remove these bot options?

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  • Does the Win-10 bash command give you access to grub-mkconfig & update-grub? (I don't have Win-10 so can't test this)
    – Mark Williams
    Apr 10, 2016 at 7:34
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    If you can boot to Windows, you can use EasyUEFI to create, delete, edit, and change the order of EFI boot entries.
    – Rod Smith
    Apr 10, 2016 at 12:44
  • You can use software to remove GRUB.
    – Star OS
    Apr 12, 2016 at 10:58
  • If UEFI you can also houseclean UEFI entry & /EFI/ubuntu folder in ESP. See: askubuntu.com/questions/429610/…
    – oldfred
    Feb 4, 2019 at 18:08

2 Answers 2

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With the new EFI system the windows and Linux bootmanager are separated. To use the windows boot manager as the default one instead of grub, just select it as the default EFI boot manager in the BIOS settings and you'll automatically boot into Windows by default

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  • I did this already. But how to remove Ubuntu boot options from BIOS?
    – Krzysztof Majewski
    Apr 10, 2016 at 7:51
  • First of all, if you have selected windows boot manager as your default boot manager, you wouldn't see grub when you boot up. Anyways, even if you're using grub, you can try booting from a live image and then reinstalling grub (try out boot-repair)
    – Rakshith Ravi
    Apr 11, 2016 at 16:04
  • I am not seeing GRUB but there are still Ubuntu boot options in BIOS. Thats what I want to remove,,,
    – Krzysztof Majewski
    Apr 11, 2016 at 18:51
  • Oh. That I'm not sure. I believe removing the .efi file from the EFI partition should remove it from the BIOS list. Not sure though. Google it
    – Rakshith Ravi
    Apr 25, 2016 at 15:30
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The easiest way to remove ubuntu safely from dual boot is to use EaseUS partition master before deleting Ubuntu partitions.

  1. Download and install EaseUs partition master on Windows.
  2. Select the hard disk and right click and choose rebuild MBR
  3. Choose your OS and click on apply button at the top bar.

Now you can delete or format Ubuntu partitions.

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