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Allow me to give some context first.

So I was a goof and being a complete Ubuntu noob I deleted UEFI partition shortly after installing Ubuntu 16.04 LTS. I then booted back into Live CD to do a complete reinstall of Ubuntu, along with UEFI and boot disk repartitioning. I also then ran boot-repair to do Separate /boot/efi partition to sda6, which is where the EFI partition on my hard drive is located.

So boot-repair does its thing, but unable to detect the Windows OS installation in other partitions, thus unable to make EFI boot files for GRUB.

Please help! I really wanna go back to boot back to Windows.

For more info, I have tried boot-repair recommended install after Separate boot/efi partition, to no avail.

Link to boot-info: https://pastebin.com/niUX318E

Adrianus Matthew Sukuramsyah
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  • The first thing you must do is to do a Windows boot repair. Boot with Windows 10 boot CD to do it. – Redbob Sep 08 '17 at 13:21
  • I'm not sure I have access to a Windows 10 boot CD because I installed Windows 10 through Windows 7 upgrade years ago. – Adrianus Matthew Sukuramsyah Sep 08 '17 at 13:47
  • Since UEFI can you directly boot Windows from UEFI boot menu, often f10 or f12? Boot-Repair says "NTFS signature is missing." which often means chkdsk required but could be you left Windows fast start up or hibernation on. You may try f8 from direct boot of Windows, but usually need the Windows repair flash drive for Windows fixes. Windows will turn fast start back on in back ground with updates, so always make sure it is off. http://askubuntu.com/questions/843153/ubuntu-16-showing-windows-10-partitions Be sure to always boot in UEFI boot mode as you also show grub in MBR for BIOS boot. – oldfred Sep 08 '17 at 14:58
  • You can download a new Windows 10 ISO from Microsoft and burn it to a CD: https://www.microsoft.com/software-download/windows10ISO – Redbob Sep 08 '17 at 15:07
  • Okay, I'll try downloading the ISO. – Adrianus Matthew Sukuramsyah Sep 08 '17 at 16:14
  • And I'll attempt your fix as well oldfred, and get back to you asap. – Adrianus Matthew Sukuramsyah Sep 08 '17 at 16:16
  • So I tried direct boot through UEFI, and got messages indicating that Microsoft boot images were not found. – Adrianus Matthew Sukuramsyah Sep 09 '17 at 01:44
  • Booted Windows 10 install disk as well, ran startup repair and its not detecting the windows installation – Adrianus Matthew Sukuramsyah Sep 09 '17 at 10:40
  • Okay, looks like even windows boot cd isn't able to help. I'm going to make disk image of the windows partitions, delete those partitions, and do a clean install of windows again. – Adrianus Matthew Sukuramsyah Sep 09 '17 at 10:47
  • After you re-install Windows, the computer will boot straight to it. The easiest way to fix this problem is to use EasyUEFI in Windows, which enables you to adjust the boot order. – Rod Smith Sep 11 '17 at 18:34

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