Replacing Windows 8 with Other OS

Installing other operating system on a Pre-Installed Windows 8 (64-bit) System (UEFI Supported) 

BIOS SETTINGS

Security Menu:

(1) Secure Boot [Enabled] change to [Disabled]

(2) Reset to Setup Mode [Enter] - press "Enter" to clear PK, disable secure boot and enter setup mode.

Boot Menu:

(1) Boot Mode [UEFI] change to [Legacy Support]

 (2) Boot Priority [UEFI First] change to [Legacy First]

 (3) USB Boot [Enabled] leave as enabled

Exit Menu:

 OS Optomised Defaults [Win8 64Bit] change to [Other OS]

Restart the system or Laptop to install other OS.