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I am new to VirtualBox and to Ubuntu. I have a PC running Vista and am trying to install Ubuntu and then run NASA LINUX software. In my first try I installed VirtualBox and set up a virtual computer named Ubuntu. Then I downloaded a Ubuntu ISO file. The first time wizard couldn't find the ISO file. The Second try, I downloaded the ISO file and saved it to the desktop. The VirtualBox could no longer use the first time wizard and I couldn't find CD/DVD in the menu.

Please help with some step.

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marked as duplicate by Eric Carvalho, Kevin Bowen, Seth, Amith KK, con-f-use Apr 4 '13 at 6:36

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

You can't mount CD/DVD image file via virtual machine settings:

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Just mount the Ubuntu iso file there, and restart your virtual machine. If it's still not booting from the Live CD, check the boot order of your virtual machine.

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