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: here.

Remove these adsRemove these ads by Signing Up

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
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 ).
RichB31 month ago
Computothought10 months ago

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

eLab (author)  Computothought1 month ago

Sure, let us know how it worked out!

LouisR111 months ago

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

eLab (author)  LouisR11 month ago

Yes, UNetbootin will create a live Image in your USB drive.

GouravG10 months ago


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.

eLab (author)  GouravG1 month ago

You can always use the grub menu but keeping Windows 8.1 as a default option. That can be done with Grub customizer.

Md JamalU GouravG6 months ago

Hey Gourav, did you get your answer? I am looking for the same thing. Let me know if you know how to do it.

If you install Ubuntu first, and THEN Windows 8.1 your prioritized boot option will load first. If you wish to load the other operating system you'd have to enter your BIOS upon restart and change the boot order manually - be sure to change it back the next time you restart if you wish to use our preferred OS again.

NiCk0106 months ago
I shrink about 20gb of c drive but in Ubuntu installer the shrink space is showing as unusable space what should I do now? Also can you Tell me the partition size to install Ubuntu in 20gb
eLab (author)  NiCk0101 month ago

That's strange. Try reusing that space in Windows and then shrinking it again. Well there is no particular size, but personaly I usually use around 15 GB.

yathavany9 months ago


if i installing the softwares in ubunthu, which partition is ues for the installation? please replay

eLab (author)  yathavany1 month ago

It depends on what you're installing and how you want to organize your data.

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