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I wanted to install Ubuntu with dual-boot but the installer couldn't find the windows partition.

I read online that erasing the GPT could help. I did so with gdisk (wich told me that I have MBR protective and GPT present). After that I cannot load windows and Ubuntu still tell me that windows is not installed.

When I try to boot, I get a message from the motherboard that says "Default boot device missing or boot failed".

gdisk now say that I have MBR protective and no GPT.

I tried all the boot list, nothing works.

I'm scared I cannot recover my data... :/

Jojojojo
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2 Answers2

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"MBR Protective" is a part of the GPT, but since you've deleted the GPT partitioning, you will need to reinstall then restore from your last backup.

K7AAY
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You should be able to recover partitions. You need to turn off "legacy boot" in your BIOS. (you should have done this before installing; then you would not have had your problems). By allowing only UEFI boot, the Ubuntu live disk will boot in this mode.

EDIT: Your bios is not guaranteed to call it 'legacy boot'. You want to allow only EFI/UEFI boot (they mean the same thing). Legacy boot is sometimes called CSM. Learn more: Difference between Legacy BIOS and UEFI )

Then, try this: https://ubuntuforums.org/showthread.php?t=370121

Be very careful deleting partitions or partition tables. It's worth while researching what you are about to do, rather than trusting advice, or misunderstanding it. Or ask here.

Tim Richardson
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