What is UEFI-SHELL-ERROR?
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.
Common Causes
- Corrupted EFI bootloader
- Deleted EFI partition
- Bad boot order
Step-by-Step Fix Guide
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1
Set the correct boot device in the BIOS
As a first move, Set the correct boot device in the BIOS handles the most common scenario behind UEFI-SHELL-ERROR.
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2
Repair EFI with bcdboot
When the first step isn't enough, the later steps handle the edge cases tied to sw-bios instability.
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3
Run Startup Repair from Windows USB
For lingering UEFI-SHELL-ERROR cases, "Run Startup Repair from Windows USB" is worth running through.
Commands & Diagnostics
bcdboot C:\Windows /s S: /f UEFI
Frequently Asked Questions
The leading cause of UEFI-SHELL-ERROR is corrupted EFI bootloader, though deleted EFI partition and bad boot order also show up in our reports.
Most UEFI-SHELL-ERROR reports resolve after "Set the correct boot device in the BIOS". The rest of the guide above is there for the cases that don't.
Rated high severity — UEFI-SHELL-ERROR isn't immediately destructive, but recurring instances are a sign to fix it sooner rather than later.
In most cases, yes — the guide above resolves UEFI-SHELL-ERROR without a clean install. Treat a reinstall as the last resort, not the first move.
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