virtualbox.org

Hi, I'm starting to study Computer Security and I need to install Virtual Box.
I already use it a while ago, but for mobile application tests. In this case it would be to test operating systems and I do not know how to configure the installation, if I have to take into account the environment variables, etc.
Some idea of where to find documentation, rease again and again by Oracle without success.
Thank you.

Thanks, I'm looking at the rules of the forum the way to thank and show that your response is good, but for more than reviewing it, I can not find it.
Forgive my mouth, but I have to use the translator.
And forgive me if my way of asking is not the most appropriate, and review the rules again and again.