Windows 8 not in GRUB menu

What is the output of:

sudo update-grub

Thanks

barry@barry-desktop:~$ sudo update-grub
[sudo] password for barry:
Generating grub configuration file ...
Found linux image: /boot/vmlinuz-3.19.0-73-generic
Found initrd image: /boot/initrd.img-3.19.0-73-generic
Found linux image: /boot/vmlinuz-3.19.0-15-generic
Found initrd image: /boot/initrd.img-3.19.0-15-generic
Found memtest86+ image: /boot/memtest86+.elf
Found memtest86+ image: /boot/memtest86+.bin
done

Thanks for your prompt response.

When you ran it, was /dev/sda3 mounted OK?

No it appears sda3 is not mounted. What are the commands for mounting sda3 please?

I get the following response when I mount sda3:

barry@barry-desktop:~$ sudo mount /dev/sda3 /mnt
mount: wrong fs type, bad option, bad superblock on /dev/sda3,
        missing codepage or helper program, or other error

        In some cases useful info is found in syslog - try
        dmesg | tail or so.
barry@barry-desktop:~$

On 05/11/16 23:10, actionparsnip wrote:
> Your question #403804 on Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+question/403804
>
> Status: Open => Needs information
>
> actionparsnip requested more information:
> When you ran it, was /dev/sda3 mounted OK?
>

When you boot your PC, try pressing the Key for your motherboard that gives you the boot options menu ( on mine its F11).. Does it give you an option for Windows Boot Manager? and if you select this does it boot into Windows Fine?

If so, take a look here..

http://askubuntu.com/questions/661947/add-windows-10-to-grub-os-list

Or do as I do and just press F11 to select the Windows Boot Manager when windows is needed.

Yes, I have been doing as you say for the past week, switching to
Windows by going into UEFI setup. It's just that I had the dual boot
grub menu before I did current reinstallation , so I ask myself, why
can't I have it again. Advice at
https://itsfoss.co/no-grub-windows-linux/ says to enter the following
line in the command window in Windows: bcdedit /set {bootmgr} path
\EFI\ubuntu\grubx64.efi. I have done this.

I have also entered the command sudo grub-install dev/sda4 with the
following result:

barry@barry-desktop:~$ sudo grub-install /dev/sda4
Installing for i386-pc platform.
grub-install: warning: File system `ntfs' doesn't support embedding.
grub-install: warning: Embedding is not possible. GRUB can only be
installed in this setup by using blocklists. However, blocklists are
UNRELIABLE and their use is discouraged..
grub-install: error: will not proceed with blocklists.
barry@barry-desktop:~$

Does anybody have any comment?

On 09/11/16 06:02, David Pearson wrote:
> Your question #403804 on Ubuntu changed:
> https://answers.launchpad.net/ubuntu/+question/403804
>
> David Pearson posted a new comment:
> When you boot your PC, try pressing the Key for your motherboard that
> gives you the boot options menu ( on mine its F11).. Does it give you
> an option for Windows Boot Manager? and if you select this does it boot
> into Windows Fine?
>
> If so, take a look here..
>
> http://askubuntu.com/questions/661947/add-windows-10-to-grub-os-list
>
> Or do as I do and just press F11 to select the Windows Boot Manager when
> windows is needed.
>

After doing another reinstallation I now have a GRUB menu showing both Ubuntu and Windows. Thanks to all those who showed an interest in my problem.