Solved How to install another windows 8 on another partition

I want install another copy of windows 8 on another partition. This help in installing different group of programs so I boot the suitable one related to specific problems. Moreover you can delete a problem file from the other partition. All my life I use this strategy.

Welcome to EightForums.

Is this a uEFI/BIOS firmware install or a BIOS install?

Than follow this tutorial: (installing in uEFI mode.)
http://www.eightforums.com/tutorials/2344-dual-boot-installation-windows-8-windows-7-vista.html
Replace Windows 7 with Windows 8.

Note, you will need two Product Keys.

Boot DVD in uEFI mode.

Thanks .

In fact it was my fault that I didn't catch the [very quick] instruction to "press any key" that the first boot will be from CD or DVD , so the computer go to the current windows and I couldn't instal another one in another partition.