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I've been trying to get a windows dual boot running but GRUB is being a bit of a pain at the moment. I can boot into Debian from the boot menu but Windows is nowhere to be seen.

Boot-info : http://paste.ubuntu.com/24698360/

I've tried running "update-grub" and "os-prober" from inside Debian but had no luck with it. "os-prober" did detected a widows recovery partion.

I booted up a boot-repair image and repaired the MBR because I really wanted to use a windows program (Windows booted fine this time) and then again repaired GRUB after that. There is no option in the boot menu for Windows.

All comments are appreciated. -Write

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    Are you using UEFI or BIOS? Commented May 29, 2017 at 6:29

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This solution can maybe help you:

~# grub-install /dev/[BOOT PARTITION]
~# grub-update

source: https://askubuntu.com/questions/661947/add-windows-10-to-grub-os-list#661983

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  • Which Partition is the [BOOT PARTITION] ? Debian ? Commented May 29, 2017 at 3:32
  • grub-install do it automatically, you can do grub-install /dev/sdx && grub-update replace sdx with your volume.
    – AbA2L
    Commented May 29, 2017 at 3:40
  • Can you show [ -d /sys/firmware/efi ] && echo UEFI || echo BIOS in Debian and dmidecode -t0
    – user192526
    Commented May 30, 2017 at 13:50
  • Just to save a couple of minute to the non-expert like me, I think it's update-grub, and you need to run with sudo. grub-update is unknown for me (Xubuntu 20.04).
    – thebucc
    Commented Sep 17, 2020 at 15:21

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