Instructables
Picture of Dual Boot Ubuntu and Windows 8 UEFI
Ubuntu installation alongside Windows has always been relatively easy to do, however, the new computers with Windows 8 have new safety and protection mechanisms and new Bios (UEFI), that make this process a little harder.

This post will guide you through the necessary steps to achieve a successful Ubuntu installation, alongside Windows 8.

Be aware that dealing with partitions is a risky job if you don't know what you're doing. You can do permanent damages and lose data.

Source: http://elabualg.wordpress.com/2013/10/22/dual-boot-ubuntu-and-windows-8-uefi/

Step 1: Windows Backup

Picture of Windows Backup
image system.jpg
recover disc.jpg
Managing disk partitions is always a risky job, therefore it is advised to make a backup of your Windows files. This way, if things go wrong, you still have a last chance of recovery.

In the Windows Start menu type: “Windows 7 File Recovery” and select that option.

For some weird reason, although this is a Windows 8 machine, this tool is still called “Windows 7 File Recovery”.

On the left panel, select “System Repair Disk”.

And then also a “System Image”.

Make sure you complete those actions

Step 2: Reducing Your Windows Partition

Picture of Reducing Your Windows Partition
reduce.jpg
After that it’s time to reduce the Windows partition, so you can free up some space for Ubuntu.

Right click over “Computer” and select “Manage”,  then “Storage” and then “Disk Management (local)”.

Right click the Windows partition, and select “Shrink Volume”.

Then you can select how much space you want shrink from the Windows partition. In our case, we selected around 250GB because the disk was 1TB and we’re only using about 55GB (yes, the images have different values because they were taken afterwards, just ignore that :P ).
 
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GouravG1 month ago

hi,

I have a Question..After dual booting with Ubuntu is it still possible to set default boot to windows 8.1....i.e no grub menu to choose b/w ubuntu/Windows. I use Linux occasionally. thanks.

When I get a new machine, I will try this.

LouisR12 months ago

At this point should the usb be plugged into my computer?

u mean also ignore every thing is in spanish as well?
eLab (author)  astral_mage1 year ago
Sorry but the system was in Portuguese.