As I have way less experience with EFI than legacy BIOS, I hesitated to add my comment.
But there seems to be no answer to your question so far, I'll add my 2 cents.
If you can still boot from your Windows installation, there is a hope.
You should be able to proceed as in the legacy BIOS setting (see above postings) but use GRUB2 instead of EasyBCD.
The detail is explained at EasyBCD website: https://neosmart.net/wiki/easybcd/uefi/
Option 3: Use GRUB2 EFI as your main boot manager
While I cannot guarantee the result, it is worth trying before resorting to the hardware solution (replacing or reflashing ROM chip).
#579
As I have way less experience with EFI than legacy BIOS, I hesitated to add my comment.
But there seems to be no answer to your question so far, I'll add my 2 cents.
If you can still boot from your Windows installation, there is a hope. /neosmart. net/wiki/ easybcd/ uefi/
You should be able to proceed as in the legacy BIOS setting (see above postings) but use GRUB2 instead of EasyBCD.
The detail is explained at EasyBCD website:
https:/
Option 3: Use GRUB2 EFI as your main boot manager
While I cannot guarantee the result, it is worth trying before resorting to the hardware solution (replacing or reflashing ROM chip).