Ubuntu 16.04 and Win 8 can't dual booting

[Ralf Mardorf]

On Mon, 2017-10-30 at 18:49 +0100, Liam Proven wrote:
> On 30 October 2017 at 18:27, J. L. <jl.ffm at gmx.net> wrote:
> 
> > Most likely but i'm not absolutely sure as i do not know how Your system
> > was exactly configured beforen the Linux-installation the cause for Your
> > problems is that You deleted the _first_ Windows-partition with Windows-7.
> > 
> > "Usually" one would assume that Windows 7 has been installed before
> > Windows 8. And Windows usually places its boot-loader in the first
> > Windows-partition which in Your case unfortunately has been changed and
> > lost to EXT4.
> > 
> > You should try to (semi-)-"automatically" recover Your
> > Windows-8-installation by booting from the DVD and to "repair an
> > existing Windows-installation".
> > 
> > Hopefully You did not have any relevant data in Your first partition as
> > after EXT4-ing it most probably all existing data on this partition has
> > been lost.
> 
> This.
> 
> If the OP installed Win8 _after_ Win7, they'd have shared a boot
> loader. Win8 could have been removed OK but removing Win7 would render
> Win8 non-bootable.
> 
> It _might_ be possible to fix the Win8 installation using Startup
> Recovery from a Windows boot disk.
> 
> If the OP does not have a Windows boot disk, MS makes Win8 freely downloadable.
> 
> https://www.microsoft.com/en-us/software-download/windows8ISO
> 
> That should enable them to fix Win8 -- and if desired upgrade it to Win8.1 too.
> 
> After it is working again, the free upgrade to Win10 is still
> available if you just enable an accessibility tool such as Windows
> Narrator or Windows Magnifier.

Good point! So for the moment 'sudo update-grub' and all other GRUB
related hints gain you nothing, since GRUB does chainload Windows, so
you need to fix the Windows bootloader first and after that run
'sudo update-grub'.