I want to reinstall my Windows 10. If I am correct I need to delete the ntfs Files System, that is the partition sda2 and sda3, right ? I should not delete sda1 because it is the partition used for booting the system, right ?

After reinstalling Windows will Grub be working fine or do I need to fix it and how ?

Gparted Image

  • Don't delete any partitions. Just reinstall Windows, and then use the boot-repair tool from the Ubuntu website. – TheWanderer Jan 17 '16 at 15:35
  • Well actually I want to delete the partitions. – Devid Jan 17 '16 at 15:38
  • 1
    Delete sda2 then. sda3 is a Lenovo recovery partition, which might come in handy. – TheWanderer Jan 17 '16 at 15:39
  • 1
    @Devid : Just format the sda2 partition with ntfs and select this partion when reinstalling Windows ! :) – cl-netbox Jan 17 '16 at 15:43
  • Is the Lenovo partition sda3 so important, because I would also like to delete that ? After I install Windows again should I just use boot repair on a live CD ? – Devid Jan 17 '16 at 15:45

First format the sda2 partition with ntfs.
Reinstall Windows - select this partition.
Afterwards reinstall GRUB boot loader.

Boot from Ubuntu installation media.
Select Try Ubuntu without installing.

On Live desktop - open a terminal.
Execute the following commands :

sudo mount /dev/sda6 /mnt  
sudo grub-install --boot-directory=/mnt/boot /dev/sda

Note : sda = disk | sda6 = system partition

When you want to keep Windows, it is recommended to keep the sda3 Lenovo partition as well.
It might contain important tools for recovering vendor specific - Windows related functionality.
In case there is no Windows entry in GRUB menu, boot Ubuntu ... open a terminal and execute :

sudo update-grub
  • @Devid : Did you get Windows and after that GRUB installed successfully ? :) – cl-netbox Jan 19 '16 at 9:29
  • Not yet, but soon. I am confident though that your answer is the best, that is why I accept it. Thanks – Devid Jan 19 '16 at 13:40

Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Not the answer you're looking for? Browse other questions tagged or ask your own question.