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I've been using a dual booted pc with Ubuntu and Windows 10 for about 2 years now. However, all of a sudden when I turned on my computer today, I got the following message:

Failed to open \EFI\ubuntu\grubx64.efi - Not Found
Failed to open image \EFI\Ubuntu\grub64.efi: Not Found
start_image() returned Not Found

After two seconds of this message, I get the following message in blue in the center of the screen:

The selected boot device failed. Press <Enter> to Continue.

This is very odd since I haven't really done anything out of the ordinary or configure anything on my system...

When going to the Boot Option Menu, and select the windows boot manager, I am able boot up windows 10 just fine without any problem.

I need my ubuntu back! As well as the files I have on there!

Anyone have any idea how this happened and how I can fix this issue?

Thank you so much!

Ken Zhang
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1 Answers1

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I got it! What worked for me was creating a live USB disk with Ubuntu and then selecting the "try Ubuntu" option. From there I download the boot repair tool found here:

How to install the Boot-Repair tool in an Ubuntu live disc?

From the log of the boot repair it seems like all that was done was GRUB being reinstalled.

Lesson learned: back up your files in case stuff like this happens again...

Ken Zhang
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