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How to I remove windows but keep Ubuntu?

I have successfully installed Linux Ubuntu 12.04 of my computer with the USB boot method. When I installed Ubuntu, I selected the option where it lets you keep windows on the computer in a separate partition so that you can have both Linux and windows as operating systems in the computer. Well, I decided I no longer need Windows, and I very much want to remove it so Linux has more space. Can I remove windows at this point and allocate more space for Linux, and if so, how can this be done? Thank you.

marked as duplicate by mikewhatever, Eliah Kagan, Jorge Castro, jokerdino, RolandiXor Aug 15 '12 at 3:58

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.


I just thought I would write a clearer, and more noob friendly version of the others answers. :)

Steps are:

  1. Open Disk Utility (Go to menu and search for it).

  2. Identify your Windows partition. It should be a NTFS filesystem.

  3. If mounted, click the "Unmount disk" button.

  4. Click the "Format disk" button.

  5. Choose Ext4 from the dropdown list.

  6. Choose a name for the partition.

  7. Make sure that, the "Take ownership of filesystem" checkbox is ticked, and that the "Encrypt underlying device" checkbox is not.

  8. Click format.

Edit: Step 9: Open a terminal, by either searching for it in the menu or pressing CTRL + ALT + T, and type update-grub and press enter.

  1. Enjoy! :)

(Thanks to John S Gruber for Step 9.)

  • Should you end by running update-grub so that the grub menu item for Windows is removed? – John S Gruber Aug 8 '12 at 17:44
  • That would be a good idea. :) I will add that straight away. :) – MaverickMartyn Nov 11 '12 at 21:29

Just Go to Disk Utility. Identify windows partition properly format it as Linux partition.

Once done in terminal ( What is a terminal and how do I open and use it? ) type:

sudo grub-install /dev/sda

sudo update-grub

When done reboot the machine.

  • 1
    Just updating grub should be enough, no need to reinstall it. – mikewhatever Aug 3 '12 at 5:48
  • If you had install UBUNTU on separate dedicated partition of hard disk, then no need of reinstall of UBUNTU again. Just your windows will be formatted to LINUX partition if u format using Disk utility like GPART app in Ubuntu. And above command will make a GRUB to know which OS on your machine – Amit Rane Aug 3 '12 at 6:10

Just go to Disk Utility. Identify Windows partition properly and delete it. You can format it as Linux partition.

Once done, in terminal type the following:

sudo grub-install /dev/sda
sudo update-grub

When done, reboot the machine.

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