How to get back Windows on the grub menu?

[Liam Proven]

On Mon, 25 Oct 2021 at 11:02, Bo Berglund <bo.berglund at gmail.com> wrote:
> So:
> How can I get back the Windows 10 entry on the grub menu?
> The efi partition is still intact on the disk

Is there only 1 ESP?
It is mounted under `/boot/efi`?

Before you run `os-prober` I have found that it may help to ensure all
OSes' partitions are mounted first. E.g. a test install of SUSE SLE
wasn't detected until I manually mounted it first.

There's a quick HOWTO on reinstalling GRUB on UEFI here:
https://itectec.com/ubuntu/ubuntu-how-to-reinstall-grub-to-the-efi-partition/

You'll easily find many more. If you look at StackExchange or
AskUbuntu, *do not* stop with the first answer. Read them all and look
for the latest answer, not the top one.

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