My situation: new notebook ASUS UX303UB with preinstalled Windows 10 Home and 250 GB SSDorChip
My desired state: One partition with Windows 10, one partition with Linux destribution (Ubuntu 14.04.3), one partition for personal data files.
I have in "BIOS": Boot -> Fast boot = Dsiabled and Security -> Secure boot menu -> Secure boot control = Disabled
I have logged in Windows 10 -> Settings -> System -> Power & sleep -> Additional power settings -> Choose what the power buttons do -> Change settings that are currently unavailable -> Turn on fast start-up = Disabled
I have tried to install Linux distribution from USB stick with Windows 10 already installed, but was always getting the error
Unable to install GRUB in /dev/sda Executing 'grub-install /dev/sda' failed. This is a fatal error.
None of the advices from internet helped.
It is good to download all needed files before continuing with procedure described below.
A USB key of at least 4 GB will be needed. Even better if you will have >=4 GB for Ubuntu, >= 4 GB for Windows 10, >= 256 MB for Clonezilla
It is good to have another working computer.
How I have done it:
Only if you already have Windows 10 installed and configured and don't want to install and configure it again:
If you don't have your Windows 10 Product key: download and execute in Windows 10 for example ProductKey25Finder to get your product key. Send it per email to your enmail address, save it on your existing computer and on USB stick.
Download Clonezilla ISO image.
Create Clonezilla USB stick from ISO (in Windows for example with "ISO to USB").
Restart computer. When booting click Esc or F2 or F8 or F10 or F12 or Delete to get into Boot menu.
Select the option: UEFI ... this USB stick.
Connect USB device where to save the Windows 10 backup (you will probably need at least 30 GB free space) and continue.
You also may want to create back ups of other partitions.
install Linux distribution
Download Ubuntu ISO image 1+GB
Create Ubuntu USB stick from ISO (in Windows for example with "ISO to USB").
Connect this USB stick to computer.
Restart computer. When booting click Esc or F2 or F8 or F10 or F12 or Delete to get into Boot menu.
Select the option: UEFI ... this USB stick.
Caution! Deletion of partition will cause the complete loss of data on it. Delete all partitions (Yes, there maybe several of them. On my new computer there were 5, but only C:\ was visible when logged on into Windows.) so that you have only one big "unallocated space".
Create one partition EFI ~650 MB. As I understood this partition will be needed for Linux distribution to create a boot record. If you willl later delete this partition, you will loose the option to boot into Linux distribution.
Create one partition Ext4 at least 10 GB (I made 30 GB) for Linux distribution installation, set mount point to slash /.
Create one partition NTFS (I made 150 GB) for your personal data files.
Leave unallocated space at least 30 GB (I left 70 GB) for Windows 10 installation.
Select EFI partition as one where to install boot manager of the Linux distribution.
Continue with Linux distribution installation.
- Install Windows 10
Download Windows 10 ISO image 3+GB
Create Windows 10 USB stick from ISO (in Windows for example with "ISO to USB" ).
Connect this USB stick to computer.
Restart computer. When booting click Esc or F2 or F8 or F10 or F12 or Delete to get into Boot menu.
Select the option: UEFI ... this USB stick.
During Windows installation process select "Advanced tasks".
Select unallocated space, click on "New", program will create several new partitions.
Select the biggest partition that was just created from unallocated space and continue installing Windows 10.
Now to choose what operating system to log in - during boot press the button to get in the boot menu and choose operating system.
- Only if you have made a Windows 10 backup and don't want to configure it again:
Connect Clonezilla USB stick to computer.
Restart computer. When booting click Esc or F2 or F8 or F10 or F12 or Delete to get into Boot menu.
Select the option: UEFI ... this USB stick.
Connect USB device from where to recover the Windows 10 backup and continue.
If I have any errors or missed something, let me know and I will improove the decription.