Ubuntu 16.04 and Win 8 can't dual booting

[Ralf Mardorf]

On Mon, 30 Oct 2017 13:30:25 +0100, Liam Proven wrote:
>On 30 October 2017 at 12:46, Manolis L. via ubuntu-users
><ubuntu-users at lists.ubuntu.com> wrote:
>> Hi
>> Thanks Ralf. It is a relief to know that Windows partition is in
>> place. For the moment let's forget about grub and grub menu and look
>> for a simpler remedy.
>> Is there any way using "external means" e.g. Ubuntu live CD to start
>> the Windows OS ?  
>
>He is giving you the simple way.

I couldn't have said it any better.

Boot the installed Ubuntu and from command line run

  sudo update-grub

this either generates the missing Windows menu entry or the output
might provide a pointer, why no Windows menu entry could be
generated.