Windows 10 upgrade kills grub and boot-repair doesn't help

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This tutorial will explain how to restore Grub after installing Windows 7/Vista/Xp.If you are using dual boot PC with windows,Ubuntu for some reason you reinstall your windows now you may not see your grub 2 is loading because your windows installation might have been over written MBR (Master boot record).

Method 1

Using Ubuntu 9.10 livecd

First you need to download Ubuntu from Ubuntu site

In this tutorial we are assuming the Ubuntu partition is sdc3,and /boot partition is sdc2

Note:- You need to replace sdc3,sdc2 with your partitions.You can check your partition table with fdisk -l

Now Boot up ubuntu from the livecd,open terminal from Applications menu -> Accessories -> Terminal and login as root using the following command

sudo -i

mount /dev/sdc3 /mnt

mount /dev/sdc2 /mnt/boot

grub-install --root-directory=/mnt/ /dev/sdc

If you are not having “grub.cfg” file,use following contents to...

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Ok i know i was the one who posted this. But its okay, i found out how to do. Did it also and it worked perfectly. I did it from the Upgrade disk i had.

It is basically the same as Vista. Micrsoft has a Support page for this here.

Please not that you don't have to type Bootrec.exe and then choose options. You can just type Bootrec.exe/FixMbr

FixMbr is basically the thing you will be looking forward to. It will automatically detect any Windows and write a windows boot for it, deleting the previous one. (Over writing the Grub Loader)

You can then Use Create and Format Hard Disk Partitions utility in the windows 7 to delete and reclaimn the Linux drive/SWAP back. You do not need to use any Third Party Software to Partition Disk. Windows Utility is more than enough.

Here are some Steps if you dont want to go into the details on Micrsoft Website.

1. Put the Windows 7 installation/Upgrade disc in the disc drive, and then start the computer (set...

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Start-up problems. That moment when – having expected yourself to be getting on with your day's work or entertainment – you find yourself staring at a cryptic error message, or even worse, a blank screen.

No matter how many times you press reset or restart, the same impenetrable barrier blocks your path. So, what can you do? Start-up problems come in all shapes and sizes, and they can be difficult to track down.

There are, however, some sound principles to use that will resolve many errors, and in this tutorial, we're going to look at the tools and techniques required to troubleshoot most start-up problems. You should start by examining how the boot process works.

This reveals that the boot process can be split into three broad stages centred around the Grub 2 boot loader: pre-Grub, Grub and post-Grub. Knowing this allows you to focus your troubleshooting efforts based on where in the process the error or freeze occurs.

Let's start at the beginning. You...

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In this tutorial, we are going to see how to use

Boot Repair

to repair or re-install the


boot loader under Ubuntu 11.04/10.10/10.04. Boot Repair will help you repair boot problems that may occur after installing new operating systems, or re-install GRUB when it is deleted by another OS (Multi boot).

Get Started

1. Boot your Computer using a Ubuntu Live CD/



2. On the first boot screen, select Try Ubuntu without installing.

3. Once Ubuntu is loaded, open the Terminal (Ctrl+Alt+T) and install Boot Repair with these commands:

sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt-get update
sudo apt-get install -y boot-repair

4. Run now Boot Repair by opening System > Administration > Boot Repair.

5. In the next pop up message, click

Advanced options

. Select the OS you want to boot by default under the

GRUB location

tab, then select the location where you...

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It’s holiday season and so I got a hold of playing some games longly missed on Windows. Booting Windows 10 certainly unveiled several pending updates (Antivirus, Geforce, Windows updates). Since Windows 10 does not explicitly tell about big updates anymore I just did let it reboot several times, waiting for manual grub selection then.

Though this time the update essentially broke GRUB. “error: unknown filesystem. Entering rescue mode…” is certainly not what I expect from a Windows 10 update. After googling a bit I found this thread including an explanation as well as a solution for the problem: The Windows 10 update adds yet another hidden partition, but essentially rewrites the partition table which then breaks GRUB finding the correct /boot partition containing grub2/. Congrats Microsoft!

So, Windows 10 “Upgrade to Windows 10 Home, version 1511, 10586” breaks grub2 because boot block grub2 still thinks it should boot grub2 from (hd0,msdos2) when it now needs to boot...

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To be clear, it had been booting up fine. So I actually thought my theory about the update process fixing the boot loader was correct, but the past few weeks it's started having the problem, more recently, after trying various methods to fix it, it now boots up completely some of the time.

If it's by chance related I can no longer install OS updates. I figured I'd look into that after this problem was solved though, in case this is the cause.

My computer does reboot daily to install these updates, fails, and tries again, which results in it rarely being ready to go, as it often needs me to type that exit command to finish booting up. Which is annoying, due to my use being mostly remote, and now the computer is rarely booted into Windows for remote access....

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So today is the day that Microsoft let Windows 10 out the door.

Great, but compared to how we do upgrades in Linux, the Windows 10 upgrade is nothing to rave about. But that’s another discussion that I don’t have time for now, and I don’t think I’ll ever.

This short post is for those running a system on which Windows 7 or 8 (or 8.1) is installed in dual-boot fashion with one or more Linux distributions. If you have such a system and are wondering whether the integrity of the Linux side will survive an upgrade to Windows 10, well, it depends.

Let me explain…

If the setup is on a computer with UEFI firmware, with the boot files of all systems on the EFI Boot Partition, then I don’t see anything that will mess GRUB up during or after upgrading to Windows 10. That’s because the EFI Boot Partition is like a public park, where the space occupied by each operating system’s boot files is respected. So the Windows 10 upgrade script will only update the files and...

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Following the link to the Arch wiki in my previous post, there is a method provided to install GRUB to an USB stick. My idea is to use it but pointing to the partition of your hard drive where Antergos is installed. I have never done this, so, it is safer you back-up your data if not done yet in case you will have to re-install your PC. I would be very sorry if it is the case but it is a risk.

So, here we go.
1/Boot on your Antergos flash drive
2/Assuming Antergos is installed on your hard disk on the partition /dev/sdy1 or your /boot is on /dev/sdy1, run the following replacing sdy1 and sdy by your locations (the command fdisk -l should help you) :

sudo mkdir -p /mnt/usb sudo mount /dev/sdy1 /mnt/usb sudo grub-install --target=i386-pc --recheck --debug --boot-directory=/mnt/usb/boot /dev/sdy sudo grub-mkconfig -o /mnt/usb/boot/grub/grub.cfg

3/Restart your laptop and boot on your hard disk . You mght have only Antergos as options and you might have...

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is around from quite sometime, released under license GNU-GPL and it is great tool to fix the issues with your Grub and Boot, it repair frequent boot issues you may encounter in Ubuntu like when you can't boot Ubuntu after installing Windows or another Linux distribution, or when you can't boot Windows after installing Ubuntu, or when GRUB is not displayed anymore, some upgrade breaks GRUB, etc. Boot-Repair lets you fix these issues with a simple click, which (generally re-installs GRUB and) restores access to the operating systems you had installed before the issue.

Boot-Repair also has advanced options to back up table partitions, back up bootsectors, create a Boot-Info (to get help by email or forum), or change the default repair parameters: configure GRUB, add kernel options (acpi=off ...), purge GRUB, change the default OS, restore a Windows-compatible MBR, repair a broken filesystem, specify the disk where GRUB should be installed, etc.


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boot repair disk doesn u0026 39 t work - Page 1 - AirySoftware

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My computer came with Windows 8 pre-installed so I shrunk the Windows partition to make room for Ubuntu. That is how it worked for the last year. After the second reboot in Windows 10 upgrade the computer did not boot any more. GRUB only displayed a grub rescue command prompt. I found out later that the problem occurred because Windows somehow changed the partition scheme. The boot partition (containing normal GRUB data) was no longer where GRUB expected it. I don't know how and why this happened.

The first thing that you can do in the rescue mode is to see the partitions with the ls command. Mine were:

(hd0,gpt1), (hd0,gpt2), etc.

Try to find out which partition is your boot partition. There is no Tab completion, you have to type it out completely. I tried the following commands until I found the right partition:

ls (hd0,gpt1)/ ls (hd0,gpt1)/boot ls (hd0,gpt2)/


Then type set in the same prompt. It will display where GRUB looks for its files. In my...

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It wasn't trendy, funny, nor was it coined on Twitter, but we thought change told a real story about how our users defined 2010. Unlike in 2008, change was no longer a campaign slogan. But, the term still held a lot of weight. Here's an excerpt from our Word of the Year announcement in 2010:

The national debate can arguably be summarized by the question: In the past two years, has there been enough change? Has there been too much? Meanwhile, many Americans continue to face change in their homes, bank accounts and jobs. Only time will tell if the latest wave of change Americans voted for in the midterm elections will result in a negative or positive...

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