I just used wubi to install Ubuntu 18.04 on my Surface Book that uses UEFI. During the installation, it said grub failed to installed. Then after I restart, I can no longer log back into Windows. I'm now stuck with the grub console.

I've done some readings and tried to use boot-repair to troubleshoot. But the auto-repair did not work. Here's the link on the report, I hope some experts can shed some lights. http://paste.ubuntu.com/p/MBgNn5YZSS/

I have 1 harddrive with 3 partitions:

C:\ -> Windows 10 (Bitlocker encrypted)

D:\ -> Ubuntu (NTFS without encryption)

(last) -> system recovery

  • I've attempted to install Ubuntu on a new partition rather than through Wubi by using a bootable USD drive. Towards the end of the installation step, I got the same failure message. GRUB installation failed The 'grub-efi-amd64-signed' package failed to install into /target/. Without the GRUB boot loader, the installed system will not boot. – hittop Sep 5 '18 at 4:43

I used a live ubuntu USD to boot up and installed Ubuntu onto a new partition (Non-windows partition).

And I received the Grub install failure error again.

I boot up the live ubuntu once again, installed boot-repair and perform an auto repair and I'm able to boot up to Windows now.

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