![]() ![]() Replacing sdXW, sdXY, and sdXZ with the respective partition numbers. For example, sudo mount /dev/sdXW /mnt/boot If you have a separate /boot, /var or /usr partitions, repeat steps 2 and 3 to mount these partitions to /mnt/boot, ![]() Mount your partition: sudo mount /dev/sda2 /mnt #Replace sda2 with the partition from step 2 This should fix the GRUB bootloader not showing up issue and you should be able to easily boot with GRUB on a restart. shim圆4.efi file and confirm your changes. This will take you to the UEFI BIOS control panel. Reboot your computer and test to see if Windows 10 is a new option to select. To fix this, manually add your Linux distribution to the boot entry by restarting your computer. If your main partition is in an LVM, the device will instead be located in /dev/mapper/, most likely, /dev/mapper/ is the operating system. If the results identify a Windows 10 install, type sudo update-grub which will update the GRUB entries and add it. ![]() I'm going to assume in this answer that it's /dev/sda2, but make sure you use the correct partition number for your system! sudo fdisk -l, sudo blkid or GParted (which should already be installed, by default, on the live session) can help you here. Restoring the Windows Boot Manager files Press SHIFT+F10 on the Windows installation screen to open a command-line interpreter. Step 3: You should see the Boot files successfully created message. In the above command, replace the letter d with the Windows 11/10 installation drive letter that you want to add to the boot menu. You can use the Bootrec.exe tool in the Windows Recovery Environment (Windows RE) to troubleshoot and repair the following items in Windows Vista or Windows 7: A master boot record (MBR) A boot sector. Step 2: Type the following command at the Command Prompt window and then hit the Enter key. If you can see this you can either chose it or chose the Something else option. It is really clean.īoot from the live CD or live USB, in "Try Ubuntu" mode.ĭetermine the partition number of your main partition. Hi, This issue can be rectified by rebuilding the Boot Configuration data (BCD). If you have booted into UEFI you will see the Install alongside Windows option. Steps to repair the EFI boot loader: Step 1: Use the Windows Installation Media to start your PC. Repairing the EFI loader helps to fix the corrupted or missing winload.efi errors. chroot is great because it allows you to work on your actual install, instead of trying to redirect things here and there. EFI boot loader is an essential part of a computer's boot process, commonly called the UEFI boot loader (Unified Extensible Firmware Interface). I've seen various instructions for replacing GRUB by mucking around with GRUB commands or some such, but to me the easiest way is to simply chroot into your install and run update-grub. What you have to do is replace the Windows boot loader with GRUB. So it replaces GRUB with its own boot loader. When you install Windows, Windows assumes it is the only operating system (OS) on the machine, or at least it does not account for Linux. ![]()
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