The first screen you see asks if you want to Try Ubuntu or Install Ubuntu. The second box offers to install third-party software like graphics and network drivers, along with plugins for Flash and other common formats.Unless you’re trying to live a completely open source life (as some of this is proprietary), you should check both of these boxes to save some time. Because your VM is blank, Ubuntu next asks how you want to install it. Next, select your keyboard layout and Continue again.
Flip over to the System tab and in the Boot Order list, click the Optical entry.When it’s complete, you’ll see a message prompting you to reboot.Do so, and Ubuntu will ask you to remove the installation medium.Select the Storage tab and click the CD icon that says Empty next to it.On the far right side, click the other CD icon with an arrow next to it, and pick Choose Virtual Optical Disc File.