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.