Hello. Download the Elementaryos-0.3.2-stable-amd64.20151209.iso, we have to prepare a virtual machine to be installed in the Oracle VM VirtualBox. Resolution of the display, this is, but I have installed Want to VBoxGuestAdditions the expansion to 1920x925 so very small at 640x480, could not be. VBoxGuestAdditions thank you for your professor if you have person there you know how to install the installation on a virtual machine of the elementary OS. Thank you.