Let's install Ubuntu 15.04 with KDE (Kubuntu) on laptop with UEFI (in my case it was ASUS N56JR):
STEP 0: Get Kubuntu ISO
- Go to http://www.kubuntu.org/getkubuntu/
- Download Kubuntu 15.04 iso
- Burn DVD with ISO
STEP 1: UEFI
- Open UEFI menu (in my case I did it by pressing F2 just after I pressed power button on my laptop)