GRUB Rescue Error Fix Windows 11

GRUB Rescue Error Fix for Windows 11

Encountering the "GRUB Rescue" error after installing or updating Windows 11 can be frustrating. This typically happens when the GRUB bootloader, commonly used in Linux systems, gets overwritten or corrupted during Windows operations. Don't panic; you can usually fix this.

Understanding the Problem

The GRUB (GNU GRand Unified Bootloader) is responsible for loading the operating system. When it's damaged, your computer boots into the GRUB Rescue prompt instead of Windows 11. This often occurs due to:

• Windows updates overwriting the Master Boot Record (MBR) or EFI partition.
• Dual-booting Linux and Windows, and Windows modifying the boot order.
• Disk errors or corrupted partitions.

Fixing the GRUB Rescue Error

Here's a step-by-step guide to restoring your Windows 11 boot:

1. Boot from Windows 11 Installation Media: You'll need a bootable USB drive or DVD containing Windows 11 installation files. If you don't have one, you can create one using the Media Creation Tool from Microsoft's website.
2. Access the Command Prompt: Boot from the installation media. On the initial setup screen, select "Repair your computer" instead of installing Windows. Navigate to Troubleshoot > Advanced options > Command Prompt.
3. Identify the Windows Partition: Use the diskpart utility to identify the drive letter where Windows is installed. Type diskpart and press Enter. Then, type list volume and press Enter. Look for the volume labeled with your Windows installation, usually with a size greater than 20GB. Note the drive letter assigned to it (e.g., C:, D:).
4. Repair the Boot Configuration Data (BCD): Use the bootrec command to rebuild the BCD. Type the following commands, pressing Enter after each:
• bootrec /fixmbr
• bootrec /fixboot
• bootrec /scanos (This command scans for installed operating systems)
• bootrec /rebuildbcd (If the scan finds your Windows installation, you'll be prompted to add it to the boot list. Type 'Y' for Yes).
5. Exit and Reboot: Type exit to leave diskpart and then exit again to close the Command Prompt. Click "Continue" to boot into Windows 11.

Important Note: If the bootrec /scanos command doesn't detect your Windows installation, you might need to assign a drive letter to the EFI partition before rebuilding the BCD. This process is more advanced and requires careful attention to detail to avoid data loss. Search for tutorials specifically addressing EFI partition assignment if needed.

By following these steps, you should be able to successfully resolve the GRUB Rescue error and boot back into your Windows 11 system. If the problem persists, consider seeking assistance from a qualified technical professional.