Windows 10: Strange lines in bcd file after failed attempt to install Ubuntu in dual boot with Windows 10

I recently bought a new computer that came with windows 10 home installed. It has UEFI. After partitioning the disk I attempted to install Ubuntu 18.04 by using a bootable USB memory stick. Something went wrong.


The computer still works but when I do Advanced Startup I now get an additional boot option: Besides the regular options to boot from harddisk, USB or network there is now also a boot option with the name of the USB memory stick I used. It persists when the stick is not connected to the computer. If I choose this boot option, I get to the installer program which doesn't work.


The partition I made for Ubuntu is still unallocated.


The file C:/Windows/System32/Logfiles/Srt/bcdinfo.txt now contains the following lines:


Firmware Application 101fffff
-------------------------------
identifier {8ea3f722-84bb-11ea-ade5-806e6f6e6963}
device unknown
path \EFI\Boot\grubx64.efi
description Linpus lite


Linpus lite being the name of the bootable memory stick and grub the boot loader that comes with Ubuntu.


I have reinstalled Windows but it didn't remove the extra boot option. The computer is working, but I dare not attempt to install Ubuntu again for fear of doing real damage to my computer.


So my question is: What happened? It seems that grub was installed on the EFI partition as well as the installation program instead of Ubuntu itself? Is there a way of removing it? Or would it be enough to edit the bcd file? If anyone can give me advice as how to remedy this I should be grateful!

:)

 

Uninstall Ubuntu Dual boot and Repairing Dual Boot in Windows 10

Hello.

I had dual-booted my Dell laptop which came with preinstalled Windows 10. I had dual booted with Ubuntu 16.04 by creating a partition on the disk. To remove this dual boot, i.e. I only wanted to keep Windows 10, I formatted the disk, drive F(in my case),
where Ubuntu was stored. But, now whenever I boot my system, a black grub screen comes with the following message:

"Minimal BASH-like line editing is supported. For the first word, TAB lists possible command completions. Anywhere else TAB lists possible device completions.

grub> _"

Upon writing 'exit', I am able to enter Windows.

1. I wish to know the reason behind it and how it can be removed.

2. I found this site, Uninstall Ubuntu Dual boot, I went ahead and performed all the steps. But somehow
ended up with this error.

Also, I saw your reply on this thread Repairing Dual Boot in Windows 10.
But it did not help me to remove my error. I will really appreciate your help in removing this error.

Thank you.

 

Can't boot after dual-boot crash (Windows 10 and Ubuntu)

I have a problem with my Lenovo h500. I replaced the hard drive with a 1 TB WDC drive and upped the RAM to 8 GB.

The unit came with Windows 8, and I upgraded to Windows 10 and have installed every update up until May 2018.

Then I installed ubuntu 18.04 in a dual-boot configuration, keeping my Windows 10. A few days ago, while ubuntu was updating to a new version, my mouse ran out of power, and the machine suddenly switched off.

When I rebooted, I got a black screen with a message that lasted less than a second. By videoing the screen, I was able to get this:

Failed to open \EFI\BOOT\grubx64.efi – Not Found

Failed to load image \EFI\BOOT\grubx64.efi – Not Found

Start_image() returned Not Found

So, I can’t boot into windows or ubuntu, but I can get to a cmd prompt line using a Windows recovery DVD. My bios doesn’t help. It only gives me an option to start in UEFI or legacy mode. After failing with legacy, I’ve switched to UEFI permanently. But
the BIOS won’t let me scrounge around and delete references to ubuntu. And I can’t get to it through the command line on the Rescue Disk either.

So here are the things I’ve tried to fix this:

1. Ran the ubuntu Boot_repair program. Didn’t fix it.
2. Tried to replace the file in terminal. Didn’t fix it.
3. Re-installed ubuntu. Didn’t fix it. Just added another copy.
4. Removed the new installation of ubuntu. Didn’t fix it.
5. Deleted the partitions on which ubuntu resided. Created a new partition in that space. Didn’t fix it.
6. Tried to fix the FAT32 system partition through a number of different means, including:
   1. Using the bootrec /fixboot command. Response: Access is denied.
   2. Tried bootrec /rebuildbcd. Access denied.
   3. Tried to open the bcd with BCDedit. OS couldn’t find the “object.”
      
   4. Decided I needed full access to the System Disk. Assigned a drive letter to the system disk. Didn’t fix it. Access problem not fixed.
      
   5. Changed the gpt attributes of the file. Access problem not fixed..
   6. Tried the Set=id 07, and 17. Those commands, though suggested in many blogs, were not recognized by Recovery disk OS. Access problem not fixed.
      
   7. Using DISKPART, deleted the system partition. Created a new EFI partition. Didn’t fix it. SWith a brand new system drive, still can’t use the bootrec tools. Couldn’t unhide the partition I created. Still no access to bootrec tools.
      

If the problem is that the BIOS is still being told to look for the ubuntu starter, then the problem appears not reside in the system disk, which although still hidden doesn't have any references to the ubuntu files. My questions are:

Why can’t I use the bootrec tools?

On which partition is this screen message stored?

How can I access what the BIOS appears to accessing, namely, a file that is telling it to try to open ubuntu?

Why is there no ubuntu uninstall program?



Thanks

 

Dual boot Windows 10 and Ubuntu 16.04?


Once I had Windows 10 RTM dual booting with Linux 17.2. No issue whatsoever.

Here is a tutorial on dual booting Win 10 and Ubuntu 15.04
http://www.linuxandubuntu.com/home/d...th-screenshots