With trying any Linux distro, BACK UP YOUR DATA! Save your data to a separate drive. There should be no problem trying a Live ISO of Ubuntu Linux, this test run of Ubuntu Linux should not affect your current Operating System. Again though, to be safe, BACK UP YOUR DATA!
The Ubuntu Unity desktop environment is based on Gnome 3, an easy to use modern interface. Unity is a nice blend of new desktop interaction, with a nod to traditional desktop work flow. The left side bar holds your favorite applications, and the icons give indication of application functions - while applications are not in focus. The top bar provides easy access to system functions, and also provides information on those functions. Application windows occupy the majority of desktop space, and make good use of global menu function. You can maximize any application, have it fill the screen, and still have indication of other running applications not in focus - in the side bar. Pop up alerts, let you know of application function too - such as receiving email or an instant message.
Perhaps one of the nicest features of Unity, is Dash. Dash is a search function that provides you with information on data and applications. Simply start typing what you are looking for or interested in - and usually Dash provides the information before you can finish typing the search query.
Ubuntu Unity 12.04LTS is a Long Term Support distro, supported until 2017. There can sometimes be confusion on 32-bit Linux distro or 64-bit Linux distro. Most modern hardware, a couple years old, is 64-bit. If you are trying Ubuntu Unity, you will want to try Ubuntu Unity 12.04LTS amd64. amd64 is a nod to the company AMD, one of the first to implement 64-bit processing. Simply put, amd64 is 64-bit, most hardware with 64-bit capability should work fine with Ubuntu Unity 12.04LTS amd64.
Ubuntu Unity 12.04LTS is an incredibly stable, smooth operating system. A great Linux distro worth trying, friendly to those new to Linux and a powerful distro for solid production.
