If you are using a system with some older specs and are a new user or someone who wants Windows like interface, Zorin OS 6.1 Lite is what you need. The desktop is based on Lubuntu 12.04, and specially designed for those old machines which fail to load advanced user interfaces and desktop environments.
As i'ts based on a long term support release, it will be supported with security updates for a period of five years. The LXDE desktop brings in a light, customizable interface and also doesn't require high end hardware to run. Also, as its consumes less RAM, more of the system memory is available for apps which enhances multitasking experience.
You can download the new release from here. The ISO includes all Zorin software like Look Changer, Web Browser Manager etc and weighs only 641 megabytes.