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I was thinking about buying the Galago Pro 13" from System76 when it comes out, I think it'd be a great Linux laptop. However, in the future, I could see myself potentially needing to use Windows 10 (not WiNE) in a dual-boot with Ubuntu. Is this possible?

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Is this possible?

Yes. See this excellent answer on Ask Ubuntu from evgeny:

Here's the general outline:

  1. Make space for Windows
  2. Install Windows
  3. Mount the /boot direcory or partition
  4. Install the bootloader (GRUB)

Step One – Make space for Windows

Open up GParted, and make sure that you have at least 20 GB available for Windows 7, either as a partition you can remove, or as unpartitioned space. If it's a partition, remove it from GRUB to make sure it doesn't break your Ubuntu install — GParted will complain if anything bad is about to happen.

Make note of current /boot device. If that doesn't show up there, make note of the / device. The device name is something like sda5.

Step Two – Install Windows

Install Windows 7 into the space you just made

Step Three – Mount /boot

Note: Instead of mounting the boot directory or partition from the installation in the live media environment you can specify the path with the --boot-directory parameter for grub-install, more information on the manpage.

Load up from your Ubuntu live CD, and then run these commands.

  • If you DO NOT have a separate /boot partition:

    sudo mount /dev/DEVICENAME_FROM_STEP_ONE /mnt
    sudo rm -rf /boot    # Careful here, make sure YOU ARE USING THE LIVE CD. I tried it, it works.
    sudo ln -s /mnt/boot /boot
    
  • If you have a SEPARATE /boot partition:

    sudo mount /dev/DEVICENAME_FROM_STEP_ONE /boot
    

Step Four – Install the bootloader

Note: These instructions were initially written for Windows 7 and BIOS booting computers. If you have UEFI and Windows 8 and above you probably need to replace grub-pc with grub-efi-amd64 in sudo apt-get install grub-pc.

Then continue with those commands:

sudo apt-get update
sudo apt-get install grub-pc
sudo grub-install /dev/sda     # NOTE THAT THERE IS NO DIGIT
sudo umount /boot

And restart. It should work fine and boot both systems.

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