I have just copied my Ubuntu 64bit ISO into my USB Flash Drive and booted from there. It's my first time using a Linux distro, right now I'm using Windows 8 and writing this from the *Try Ubuntu* option. I'm just trying to install Ubuntu along with Windows 8, to keep both and select which one I want to start when I turn on my machine. I know there are similar questions, but no one helped me.

I execute the GParted program to make a partition of the hard disk. This is what I have.

![enter image description here](https://i.stack.imgur.com/isEiQ.png)

Can you see the red icon at the */dev/sda2* partition? That's the Windows 8 system, and the *sda1* is the Windows 8 booter (as far as I know). I do right-click on the *sda2* partition and try to reduce the size to something like 700mb to let 300mb to my new Ubuntu system. But it's locked. It doesn't let me to resize or touch anything. It let me when resizing the *sda1* partition but not the one with the red icon.

This is what I'm getting while doing Right-click > Information on */dev/sda2*.

![enter image description here](https://i.stack.imgur.com/zHOE5.png)

I'm very very new in this Linux-based world, so, how can I make a new partition to install this beautiful operating system?

Thanks a lot.