Firmware · high

How to fixUEFI-SHELL-ERROR

UEFI Shell - Startup Error

What this error means

UEFI-SHELL-ERROR shows up as a high-severity firmware fault. The system booted into the UEFI shell instead of the OS. The boot record is missing or corrupted. Another common trigger is deleted EFI partition. The steps below are ordered to resolve this efficiently.

Before you begin

Save open work and back up important files. Note any recent driver or hardware changes. If Windows cannot start, use the startup guide first.

Work through these checks

0 of 3 complete
01Set the correct boot device in the BIOS

Set the correct boot device in the BIOS.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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02Repair EFI with bcdboot

Repair EFI with bcdboot.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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03Run Startup Repair from Windows USB

Run Startup Repair from Windows USB.

Use the instructions for your exact device and operating system. Check the manufacturer’s documentation before changing firmware, hardware, or system settings.

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Possible causes

  • Corrupted EFI bootloader
  • Deleted EFI partition
  • Bad boot order