https://www.linuxhelp.com/install-ubuntu-16-04-xenial-xerus-on-uefi-systems/

To Install Ubuntu 16.04 (Xenial Xerus) Desktop on UEFI Firmware Systems

In this article we are going to discuss about the Installation of Ubuntu 16.04 Desktop on UEFI Firmware machines.

Before installation, disable Fast Boot and Secure Boot options on bios settings.

To Download Ubuntu 16.04 ISO image, use the following link,

http://releases.ubuntu.com/16.04/

To Install Ubuntu 16.04 Desktop

Before starting with the installation, make sure that a standard EFI partition was created. Burn an Ubuntu ISO image into drive and restart UEFI with USB/CD drive. Choose Install Ubuntu and press Enter in the Grub screen.

Select the desired "Language" and click continue.

In installation type, choose something else option so that you can create partition by yourself.

Next you can see your hard disk on installation type wizard. Choose it and click continue to create new empty partition.

Select “+” or click your hard disk free space. Now it shows create partition message box. Here you can create your partition as shown below and finally click ok.

Then create new partition for swap memory. Here, swap memory size must be double of your actual physical memory (RAM).

Instead of boot, create new partition for UEFI.

Once the partition is done, click “Install now” on installation wizard.

Then choose your Location.

Select your keyboard language and click “Continue”

Set “user name”, “password” and “host name” and click "continue”

Now the installation starts.

After the installation is completed, restart the system to apply changes.