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Here's how to Fix EFI Bootloader on Windows.

If you're experiencing issues with the EFI bootloader on your Windows system, here are some steps that you can take to fix it:

1. Use Automatic Repair: Boot your computer from a Windows installation media or recovery drive and select the "Repair your computer" option. From there, choose "Troubleshoot" - "Advanced options" - "Startup Repair" and let Windows attempt to automatically fix any startup issues.

2. Rebuild the BCD: If Automatic Repair does not work, you can try rebuilding the Boot Configuration Data (BCD) manually. To do this, boot from a Windows installation media or recovery drive, select "Repair your computer", then choose "Command Prompt". In the command prompt, type "bootrec /rebuildbcd" and press Enter. Follow the on-screen prompts to rebuild the BCD.

3. Check for disk errors: If the BCD is not the issue, there may be disk errors that are preventing the system from booting. You can run a disk check by opening Command Prompt as an administrator and typing "chkdsk /f /r C:" (substitute "C" with the drive letter of the system partition). This will check for and repair any disk errors.

4. Update BIOS/UEFI firmware: If none of the above steps work, you may need to update your system's BIOS or UEFI firmware to the latest version. Check with your system manufacturer for instructions on how to do this.

It's important to note that working with the EFI bootloader can be complex, and making changes without proper knowledge or guidance can cause further issues. If you're not comfortable troubleshooting the EFI bootloader yourself, it's recommended to seek assistance from a professional or the manufacturer's support team.