Windows 10 dual boot ubuntu grub rescue

[suryansh bhargava]

After installing windows 10, i was having problem with going in ubuntu. It showed the error message :
Error: unknown filesystem ..
Grub rescue

So, i deleted the ubuntu partition via disk management and installed a fresh ubuntu 15.04 in the same partition. Still the problem persists.

How can i solve the problem without having to install the entire windows 10 again?

[Tejesh Raut]

To load grub menu from grub rescue you need to follow following steps

First enter the command

>>ls

you will be able to find many drives

then check which drive contains the grub loader

this can be done using the command ls followed by drive name

Eg. to check grub in (hd0,msdos6)



>>ls (hd0,msdos6)


OR just


>>ls (hd0,6)




after checking the every drive if you find grub in drive (hd0,msdos5), then you can load grub menu by following commands:


>>set root=(hd0,5)


>>set prefix=(hd0,5)/boot/grub


>>insmod normal


>>normal



Once the grub menu loads go into ubuntu and update the grub using the commands:


$ sudo update-grub



If the problem persists you will have to reinstall the grub completely using the software called boot-repair from a live USB


Neither the ubuntu nor windows will be lost while using boot-repair



Tejesh Raut








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[Abhijit Tomar]

From my experience it is not easy (if possible at all) to install Windows over Ubuntu and still retain everything. Never seen anyone do that.
Installing Ubuntu over Windows is already hard enough (depending upon your laptop brand), and you might mess things up - but it is definitely possible.
I may be wrong, but my advice would be wipe everything and install Windows again without any other OS. Then install Ubuntu over it. Maybe it will take you time, but it will definitely work.

[Tejesh Raut]

I have installed both way first windows and then ubuntu; and also

 first ubuntu and then windows

The second way is bit tedious but possible without loss of any data

But it is much better than wiping everything and even faster than that

There are many articles on askubuntu for installing the second way

-Tejesh Raut

[Kunal Tyagi]

I installed windows 10 over Ubuntu 14.04 and all I had to do was perform a grub rescue from a live boot.
I did this on a Dell inspirion, BTW.

[Tejesh Raut]

It is not specific to the PC model but I too use Dell Inspiron 3542

This question helped me to install windows 10 after Ubuntu 14.04
http://askubuntu.com/questions/6317/how-can-i-install-windows-after-ive-installed-ubuntu/158319#158319

The answer with 67 upvotes is the one which helped and worked fine

-Tejesh Raut

[Saket Choudhary]

On Jan 21, 2016 23:15, "Tejesh Raut" <tejesh...@gmail.com> wrote:
>
> It is not specific to the PC model but I too use Dell Inspiron 3542
>
> This question helped me to install windows 10 after Ubuntu 14.04
> http://askubuntu.com/questions/6317/how-can-i-install-windows-after-ive-installed-ubuntu/158319#158319
>
> The answer with 67 upvotes is the one which helped and worked fine
>

http://askubuntu.com/a/158319/415971