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I have tried to install Ubuntu with my windows 1o. But while installing I got message that some fatal error has occurred. And after that when i restarted my laptop it's showing no Boot Device Not Found for my HP device. What should i do ? Also I don't want to loose my hard-disk data.

After running Boot repair from ubuntu loaded using usb I got this message

LegacyWindows detected. The boot of your PC is in EFI mode. You may want to retry after changing it to BIOS-compatibility/CSM/Legacy mode.
Are you sure you want to continue anyway?
Vishal Kamlapure
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  • You have an Ubuntu 20.04 / Windows 10 dual boot , and you can't boot into Windows 10. Can you boot into Ubuntu? – karel Nov 05 '20 at 14:25
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    @karel No there is no option to boot into any of them. It directly showing the screen that no boot device and Ubuntu was not installed previously. – Vishal Kamlapure Nov 05 '20 at 14:27
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    Does this answer your question? [How to remove Ubuntu and put Windows back on?](https://askubuntu.com/questions/133533/how-to-remove-ubuntu-and-put-windows-back-on) – karel Nov 05 '20 at 14:30
  • https://askubuntu.com/a/1203888/ – karel Nov 05 '20 at 14:59
  • Thanks @karel, your first post's some part worked for me. I'll answer how i solved this problem. – Vishal Kamlapure Nov 05 '20 at 16:02

1 Answers1

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After reading many posts I was able to solve this problem with basic boot-repair tool of Ubuntu.

Using a Ubuntu Live DVD and Boot Repair

  1. Boot from a Ubuntu Live DVD or USB
  2. Type these lines in the terminal one line at a time.
sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install boot-repair
  1. Search for Boot-Repair in the Dash and launch it.

enter image description here

To fix your computer with Boot-repair, simply click the "Recommended Repair" button. Then follow the steps. It will fix all the problems and then After you will be booted to ubuntu and then run following command to fix the grub menu

sudo update-grub

It worked for me.

Vishal Kamlapure
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