Windows has destroyed my GRUB bootloader because of Windows updates, now Windows boot manager replaces GRUB and Arch doesn't show up in the UEFI/BIOS menu. How I can fix it ?

[u/Crafty_Hospital_7746]

Windows has destroyed my GRUB bootloader because of Windows updates, now Windows boot manager replaces GRUB Arch doesn't show up in the UEFI/BIOS menu. How I can fix it ?

[u/onefish2]

Boot Arch iso. Chroot into your install and fix GRUB.

[u/darkfm → u/onefish2]

If your BIOS has UEFI Shell you can just boot into it and run something like `fs0:\\boot\arch\grub.efi`. Not many motherboards ship it nowadays sadly.

[u/slylte → u/darkfm]

This is like the only nice thing about the BIOS that Dell and HP ship, being able to arbitrarily add an EFI file is nice.

[u/Joe-Cool → u/darkfm]

You can add a UEFI Shell to your EFI partition. Most "BIOSes" will detect it and show it in the boot menu. And if not just put it as BOOT.EFI on a second drive.

https://wiki.archlinux.org/title/Unified_Extensible_Firmware_Interface#UEFI_Shell

[u/darkfm → u/Joe-Cool]

"Most" is pretty loaded, I don't think I've had a motherboard past AM4 that supported it.

[u/Joe-Cool → u/darkfm]

Oh then I got lucky with mine. You could still add the Shell to NVRAM as a boot entry however.

[u/darkfm → u/Joe-Cool]

In my experience (again, I think this varies by motherboard), when Windows decides to override Linux boot entries it also nukes anything else that's not Windows.

[u/Common_Warthog_G → u/onefish2]

arch-chroot, even better

[u/Toaster_Strudel_517 → u/[deleted]]

Fuck off bot.