Microsoft Windows

Restore boot files if EFI partition was deleted

• Download and write a Windows ISO to USB.
• Boot into the setup utility and select Repair computer -> Troubleshoot -> Advanced -> Cmd prompt

The following commands will format the current EFI partition, mount it to s:, and copy the boot files:

diskpart
> list disk
> sel disk 0
> list part
> sel part 1 * EFI partition
> format fs=fat32 quick label=System
> list vol * find the Windows OS drive letter, assume `C:` in this case
> exit
mountvol S: /S
bcdboot c:\windows /s s: /f UEFI /v
exit

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Last updated: 2021-11-19

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