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Though I've used Ubuntu for a few years, I'm new to installation. Previously I had help and now I'm doing it alone (moved across the world).

Windows 8.1 came preinstalled on my new laptop (Toshiba Satellite C70-A-17C - Core i5, 8 GB RAM, 750 GB HDD). I have already followed a few steps I found online to prepare for a dual install (with Ubuntu 14.04).

I backed up Windows, created a bootable Ubuntu USB and DVD (just in case one didn't work), turned off fast boot and secure boot, and shrunk C:/. The new unallocated drive portion is 292.97 GB.

After shrinking C:/, I restarted Windows a couple of times to make sure everything was working fine (it is). I then attempted to install with the Ubuntu live USB. However, the Ubuntu installer doesn't see that Windows 8.1 is already installed. I don't understand, and don't want to mess with Ubuntu partitioning when I don't know where the partitions will be created. My concern is that, if I go further with the installation process, Windows might be overwritten or compromised in some way.

I then tried to reboot using the Ubuntu live DVD, thinking I might get a different result. However, I can't figure out how to make the laptop boot from the CD drive. I went into the BIOS and found no option there, either.

Any help is very appreciated!

EDIT:

Looks like I can't link directly to each photo.
Here is my album of screenshots:
http://imgur.com/a/zChCo

  1. Here you can see that there's no option to boot from CD drive, only USB.
  2. Everything looks okay so far.
  3. I don't understand this. Ubuntu has not yet been installed. Unmounting partitions? (I chose 'no'.)
  4. Even though the laptop came pre-installed with Windows 8.1, the Ubuntu USB installer can't see it. I chose 'something else'.
  5. I need to pick and format partitions. I scrolled down and took a second shot to include all information. Completely lost and cancelled installation.

3 Answers3

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The old "install alongside" option rarely works with installations to EFI-based computers. I don't know offhand if that's a bug or if it's simply been removed. In any event, the solution is to use the "something else" option, which is covered by numerous other questions and answers here, such as:

(That last isn't part of askubuntu, but it's related.)

Rod Smith
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It would be useful if you could include some screenshots of what you see.

In normal circumstances, you see the following screens:

  • Preparing to install Ubuntu (checks requirements) -> press continue if you see free space on your HD
  • Installation type -> select Use free space (Something else requires you to have a bit of knowledge about Linux partitioning

As of then, it's simply following instructions and answering basic questions (like user/pass, location, keyboard etc). At the end it will ask you to install GRUB2 and it will automatically add your current Windows installation. Should it not do it as expected, read Add windows to my boot menu

Jakke
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Today searching in web I found partial solution, but the real solution is this:

You may be able to get GRUB to chainload Windows by adding a suitable entry to /etc/grub.d/40_custom and then doing a sudo update-grub. An entry like this:

menuentry "Windows 8" {
    exit
}