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I just got my PC back from the service where they changed the power supply. Probably that changed the setup for the dual boot I have already set up. I have installed Windows 10 and Ubuntu. When I tried to start the PC, in the grub menu there is only Ubuntu and not Windows. Tried to fix it with boot-repair but it didn't work. Here is the link from boot-repair

I have tried update-grub, editing the custom_40 file with:

menuentry "Windows 10" --class windows --class os {
   insmod ntfs
   search --no-floppy --set=root --fs-uuid $your_uuid_here$
   ntldr /bootmgr
}

with the correct uuid. Windows 10 appeared as an option but when I enter it shows the errors:

file '/boot/grub/x86_64-efi/ntfs.mod' not found

file '/boot/grub/x86_64-efi/ntldr.mod' not found
can't find command 'ntldr'

Can anyone help me?

  • @karel yes i already read that. But the guy there had win8 and win10 in his system. Also i have done the obvious update-grub and adding the commands in the replies in the custom_40 file but none of these worked :/ – Miltos Taramanidis Aug 1 at 12:41
  • @karel tried the commands in the answers but again an option is created but i'm missing some files – Miltos Taramanidis Aug 1 at 13:00
  • 1
    You need to boot in legacy-mode, that's all. Enter your UEFI-settings and choose correct boot device, dont choose the ubuntu-entry, that's for EFI-mode, instead boot to your HDD, then grub will open, choose ubuntu then and run sudo update-grub again. You have an obsolete boot-loader for ubuntu on your drive which will boot in efi-mode, but grub is also in MBR. – mook765 Aug 1 at 13:21
  • @mook765 oh god it was easier than i expected. Thank you! – Miltos Taramanidis Aug 1 at 13:35
  • Would you please mind to provide an answer by yourself, I'd give it an upvote. – mook765 Aug 1 at 13:38
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As suggested by @mook765 all I had to do was to change the boot order and make boot option #1 from hard drive and not Ubuntu. With that way Windows loaded with no problem!

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