It used to be the case that PC users had the choice of installing Windows or, if they were feeling adventurous, a version of Linux. This is still true, but it is now also possible to install OS X without owning a Mac and virtualization means that you can do all of this alongside your main operating system in a virtual computer.
This being Android.AppStorm, you may well wonder what virtualization has to do with your phone or tablet. Well, how would you feel about the chance of installing and running Android on your PC? Using a free copy of VirtualBox and the information in this guide, you can run a fully functioning – and legal – version of Jelly Bean on your computer.