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475 votes

Uninstall GRUB and use Windows bootloader

This answer is for those with UEFI who have deleted the Ubuntu partitions before removing grub You will be doing this from Windows 10. No bootable media required. Where bootrec /fixmbr, bootsect /...
armadadrive's user avatar
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90 votes

Uninstall GRUB and use Windows bootloader

To restore Win 10 default bootloader follow these steps: Log into Win 10 Open Command Prompt (Admin) c:\> bootsect /nt60 <drive name>: /mbr <drive name> is the drive letter where the ...
Ganesh Kondal's user avatar
42 votes

In a dual boot system, how does the BIOS choose which bootloader to run?

BIOS firmware doesn't really choose the bootloader. It loads code from sector 0 of a drive and executes it. Whatever is there, it will execute. Hopefully it is a bootloader (or something that loads ...
LawrenceC's user avatar
  • 521
35 votes

Uninstall GRUB and use Windows bootloader

Remove Boot Loader EFI / System Partion in Windows 10 Quick Guide Open PowerShell as Administrator mountvol S: /S S: cd .\EFI\ dir Remove-Item -Recurse Ubuntu Details Administrator PowerShell Enter ...
Felix Quehl's user avatar
26 votes
Accepted

Dual-Booting OS X or macOS with Linux without rEFInd

Ubuntu installs grub and other files in the first EFI System partition on a Mac computer. Normally, this is the first partition on a Mac computer. The process of making the Ubuntu appear on the ...
David Anderson's user avatar
20 votes

In a dual boot system, how does the BIOS choose which bootloader to run?

This diagram shows how control passes from the firmware (BIOS or UEFI) to the bootloader and from the bootloader to the operating system in Ubuntu.           BIOS vs. UEFI If the OSs were installed ...
karel's user avatar
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20 votes
Accepted

Pros and cons of installing Ubuntu alongside Windows Boot Manager

On a personal note, I would recommend you to stick with the "Something else" option only. The reason is that I have personally created issues with 4 laptop hard disks simply because I failed ...
Manu Mathur's user avatar
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19 votes

Dual-Booting OS X or macOS with Linux without rEFInd

Be aware that neither rEFIt nor rEFInd damages, much less "wipes out," the default Apple boot loader; indeed, both rEFIt and rEFInd simply insert themselves into the boot process and then launch Apple'...
Rod Smith's user avatar
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18 votes
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How to remove "Ubuntu" from Boot Menu after deleting Ubuntu partition in Windows 10 (Dual Boot)

I've successfully executed this solution below to my problem: In BIOS, change Boot Sequence to allow booting from USB (containing Ubuntu) In GRUB, select Try Ubuntu without installing Once in ...
Keith OYS's user avatar
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17 votes
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What is the current best way to dual boot a Mac with Ubuntu on the latest 10.12 macOS?

I spend the last 3 nights searching every corner of the web for a straightforward guide how to dualboot the latest macOS 10.12 Sierra with Ubuntu, but it seems like there is just so many ways people ...
Rod Smith's user avatar
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17 votes
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Move bootloader or remove efi partition in second drive

Facing the very same problem with Ubuntu 18.04, I followed PrakashS's answer while making sure the new EFI partition was mounted at /boot/efi before installing grub into it. I first created a new ...
David Oliver's user avatar
14 votes

How to remove "Ubuntu" from Boot Menu after deleting Ubuntu partition in Windows 10 (Dual Boot)

Open the Command Prompt (Admin) ( shown in the options image above ). Follow these commands-> Note the line after ‘#’ is just to explain the command > diskpart > list disk # select the ...
Shaurya Uppal's user avatar
13 votes

How do I re-run boot loader?

$ sudo update-grub And if you want delete / purge old packages you can do also $ dpkg --list |grep "^rc" | cut -d " " -f 3 | xargs sudo dpkg --purge
pa75's user avatar
  • 131
13 votes

How Shim verifies binaries in secure boot?

Kaz Wolfe's answer is pretty good, but I want to emphasize and expand on a couple of points.... The last I checked, Shim basically provided a sort of parallel Secure Boot verification feature. It's ...
Rod Smith's user avatar
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12 votes
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DMAR firmware bug. Broken BIOS?

DMAR firmware bug. Broken BIOS? Yes, it is the BIOS that is giving the kernel information that is incorrect (ie. does not follow the specification). DMAR is mainly used for GPU passthrough to a ...
Rinzwind's user avatar
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11 votes
Accepted

Put old SSD with Win10 Installed into laptop with Linux and boot Windows?

I booted into Win10 and it worked fine (with my login and all). Didn't get any errors about invalid license due to different hardware. Before I booted, I ran sudo update-grub with both disks installed....
LinuxNinja's user avatar
10 votes

Restore Windows bootloader

Add Windows to GRUB boot menu Add Windows 10 to GRUB OS list Boot Windows from grub rescue prompt Boot Windows from grub rescue command prompt Repair Windows MBR This tutorial shows how to repair ...
karel's user avatar
  • 116k
10 votes
Accepted

How to boot from USB when USB stick is plugged in and otherwise Windows from HD?

Configuring the computer to boot from the Ubuntu USB stick if it is inserted, otherwise to boot to Windows if it is not inserted can be done by changing the boot priority settings, which is often ...
karel's user avatar
  • 116k
9 votes

Uninstall GRUB and use Windows bootloader

No CD's, USB's, DVD's. No long tutorials. On UEFI all you have to do is: Place Windows boot entry in NVRAM as first. How to do this - several solutions. Easiest solution is to use firmware ...
snayob's user avatar
  • 437
9 votes
Accepted

Select device boot installation for installing Ubuntu dual boot with Windows 10

To answer you question, selecting the entire ssd will work, but having the bootloader in a separate drive can cause issues. So as a safer alternative what you can do is make a new EFI partition and ...
VidathD's user avatar
  • 2,734
8 votes

Uninstall GRUB and use Windows bootloader

What worked for me is: Boot to Windows Win + X Command Prompt (as admin) bcdedit /set {bootmgr} path \EFI\Microsoft\Boot\bootmgfw.efi Reboot
Herobrine2Nether's user avatar
7 votes

Where to install bootloader when installing Ubuntu as secondary OS?

Out of my experience: if the boot system is legacy/BIOS, choose the device /dev/sda straight away. Even suggesting other possibilities had been earmarked as a bug (https://bugs.launchpad.net/ubuntu/+...
XavierStuvw's user avatar
  • 1,451
7 votes
Accepted

Trying to understand the boot loader process / GRUB?

Please don't get confused the steps are: The basic steps are: 1. The BIOS/UEFI locates and executes the boot program or bootloader. 2. The bootloader loads the kernel. 3. The kernel starts the `...
George Udosen's user avatar
7 votes

In a dual boot system, how does the BIOS choose which bootloader to run?

In legacy mode (BIOS boot and not UEFI) BIOS controls the drive order. Once upon a time this used to be controlled by the cables; but changing a BIOS setting beats opening the box & changing ...
guiverc's user avatar
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7 votes
Accepted

How can I prevent grub updates from resetting my EFI bootorder

sudo dpkg-reconfigure grub-efi-amd64 For the first couple of questions accept the existing values (just press Enter) but when it comes to this, select No: +----------------------| Configuring grub-...
Tobia's user avatar
  • 575
7 votes

Move bootloader or remove efi partition in second drive

Follow this procedure to move the boot loader: Find the UUID of /dev/sdb1 using sudo blkid (copy it) Change the UUID of boot/efi entry in /etc/fstab with that of sdb1 sudo grub-install /dev/sdb sudo ...
PrakashS's user avatar
  • 136
7 votes

Put old SSD with Win10 Installed into laptop with Linux and boot Windows?

I call this a "Frankenstein" build. You're taking the brains from one machine and putting it into an entirely different machine. It might work and it might not. It also might appear to work, ...
Nmath's user avatar
  • 12.4k
6 votes

rEFInd Question: Remove multiple boot items?

Easy Fix In rEFInd bootloader menu, you can hide the excess entries by selecting the extra entries by arrow keys in keyboard and then pressing the Delete key! A confirmation will pop up...upon ...
Soujatya Sarkar's user avatar
6 votes

Installing multiple linux distros alongside Windows with GRUB and UEFI

As a general rule and IMHO, installing multiple Linux distributions to multi-boot on a single computer is more trouble than it's worth. For the most part, one distribution will do what the others will ...
Rod Smith's user avatar
  • 44.4k

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